I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.

"FMurtz" wrote in message
...
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.

Google doesn't decide anything, all it can do is show you what has been
discussed.

FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


It has probably been tried and not found to be a beneficial mix.

As you probably know, propane and butane have different characteristics-
propane is better at lower temperatures (in simple terms) for example.
However. Sometimes they mix the two to get the best of both worlds.

Some of the cylinders used in camping etc are a mix of butane and propane.
Some are just propane. Ones used indoors tend to be butane- at least the
larger ones.

LPG for cars is a mix I believe.

The energy each releases is slightly different which used to be compensated
for, at least in some applications, by using different regulators to give
different pressures. However, at least in some applications, a common
pressure is used and you can switch between the two or use a mix these
days.

Having said that, at least for larger cylinders (the exchangeable sized
ones), butane tends to be indoors and propane outdoors.

Interestingly, bottled LPG is widely used in France domestically. Weve
hired Gites in the past and found the cooker ran from LPG cylinders. Nearly
every supermarket and most garages stock it.

FMurtz wrote:

I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.

For what reason, just looking for hotter?

Given how acetylene is stored in solution, would a convenient single
cylinder mixed with propane or butane even be possible?

Seems the danger of acetylene storage is "tolerated" for oxy/acetylene,
where two cylinders mixed at the torch gives you the advantage of
controlling oxidising vs reducing flame ... but if you can't control the
oxygen in your propane/acetylene (or butane/acetylene) mix would it
bring any advantage for the increased risk?

Brian Reay wrote:
FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


It has probably been tried and not found to be a beneficial mix.

Map gas is a mixture of methylacetylene (propyne) and propadiene what
ever they are.

As you probably know, propane and butane have different characteristics-
propane is better at lower temperatures (in simple terms) for example.
However. Sometimes they mix the two to get the best of both worlds.

Some of the cylinders used in camping etc are a mix of butane and propane.
Some are just propane. Ones used indoors tend to be butane- at least the
larger ones.

LPG for cars is a mix I believe.

The energy each releases is slightly different which used to be compensated
for, at least in some applications, by using different regulators to give
different pressures. However, at least in some applications, a common
pressure is used and you can switch between the two or use a mix these
days.

Having said that, at least for larger cylinders (the exchangeable sized
ones), butane tends to be indoors and propane outdoors.

Interestingly, bottled LPG is widely used in France domestically. Weve
hired Gites in the past and found the cooker ran from LPG cylinders. Nearly
every supermarket and most garages stock it.

same here in Australi and vehicles run on it

FMurtz wrote:
Brian Reay wrote:
FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


It has probably been tried and not found to be a beneficial mix.

Map gas is a mixture of methylacetylene (propyne) and propadiene what
ever they are.


Propyne is C3H4, as is propadiene. They are isomers- ie they have the same
formula but the molecule is assembled differently. How that makes a
difference when the burn I dont know/ cant remember how to work out
beyond the basic theory below.

Propane is C3H8, butane C4H10.

There are some rough rules / guidelines re energy you get from from the
formula ( you can work it out, here I mean general guides, not numbers).

Butane tends to release more energy than propane due to the longer carbon
chain.

Propyne more than propane due to the more complex (double) bounding which
is another factor in energy released.

Acetylene is C2H2.

While it has a short chain, the triple C to C bond releases a lot of energy
when it burns.

There are other factors* but that is the basic theory, at least as I
remember my Chemistry from school.


*eg butane isnt good at low temperatures so propane is better.

On Sun, 15 Dec 2019 16:39:15 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:


Google doesn't decide anything, all it can do is show you what has been
discussed.

You are the most ridiculous, auto-contradicting, senile asshole I ever
encountered in any part on this globe, you abnormal senile Australian pest!
LOL

--
Sqwertz to Rot Speed:
"This is just a hunch, but I'm betting you're kinda an argumentative
asshole.
MID:

Maybe everyone who tried it is dead?
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"FMurtz" wrote in message
...
I asked google, about a mix of propane or butane and acetylene but only got
answers around propane butane mixes, I can not believe that people have not
experimented but google seem to have decided no one would be interested.

On 15/12/2019 04:43, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.

I'm pretty sure that acetylene would react vigorously with butane etc
but I don't know what sort of shock you'd need to start it.

Cheers
--
Clive

On 15/12/2019 04:43, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.

I suspect that acetylene is just a bit too unforgiving for anyone to
want to risk selling a mix to people unused to its fickle behaviour.

--
Regards,
Martin Brown

On 15/12/2019 13:40, Martin Brown wrote:
On 15/12/2019 04:43, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but
only got answers around propane butane mixes, I can not believe that
people have not experimented but google seem to have decided no one
would be interested.

I suspect that acetylene is just a bit too unforgiving for anyone to
want to risk selling a mix to people unused to its fickle behaviour.

+1.

It might help if you said what you were trying to find out.

On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf

Air bubbles mixed with water are a bad mix, as the customers
of Anglia Water have discovered in Bedfordshire this weekend.

Just think of all those useless Combi boilers right now :-(

Plumbers are going to be licking their chops at all the extra
work, getting boilers going, replacing ball cocks that have
been affected by crud coming through the mains, etc .


On 15/12/2019 10:15, Brian Gaff (Sofa 2) wrote:
Maybe everyone who tried it is dead?
Brian

Brian Gaff (Sofa 2) wrote

Maybe everyone who tried it is dead?

Unlikely given that we would have heard about those deaths.

"FMurtz" wrote in message
...
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.

harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.

On Mon, 16 Dec 2019 07:35:48 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:


Maybe everyone who tried it is dead?

Unlikely given that we would have heard about those deaths.

What "we" hear here, every day, is you auto-contradicting in your
pathological abnormal manner, you forsaken senile pest!

--
More senile "wisdom" from Australian bull**** artist, senile Rodent:
"Some things are much harder to do than others."
Message-ID:

On 15/12/2019 21:16, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.

Yes. We were all handed one of those when visiting the Ice Caves near
Werfen in 1999.

SteveW

On 15/12/2019 21:16, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


The point being that carbide lamps produced the gas as they went along
so did not involve acetylene under high pressure.

--
Robin
reply-to address is (intended to be) valid

On Sunday, 15 December 2019 21:16:48 UTC, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.

Only relatively recently they gave up selling calcium carbide in Halfords
You filled a container with it and adjusted the outflow of acetylene by regulating a water drip into the container.

The only advantage is compared with a battery, an acetylene lamp runs for much longer. Maybe no longer true with LED lamps.

harry wrote:
On Sunday, 15 December 2019 21:16:48 UTC, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.

Only relatively recently they gave up selling calcium carbide in Halfords
You filled a container with it and adjusted the outflow of acetylene by
regulating a water drip into the container.

The only advantage is compared with a battery, an acetylene lamp runs for
much longer. Maybe no longer true with LED lamps.



Id quite like one. I remember seeing one as a youngster and being
fascinated by the principle.

I am a bit surprised they were on sale relatively recently- at least in the
time scale of LED lamps- I was thinking more like 40 years ago but I dont
doubt what you say.

On 15/12/2019 22:30, Chris Hogg wrote:
On Sun, 15 Dec 2019 21:16:42 +0000 (UTC), Brian Reay
wrote:


I still have my carbide lamp from my pot-holing days in the early
1960's. Made by "The Premier Lamp and Eng. Co. Ltd. Leeds Eng"
I don't doubt it would still work perfectly, given a supply of
carbide. It used to be available in tall narrow red tins, say 2.5"
dia. x 8" long. It was also used in bird scarers and moisture meters.

You can still buy carbide for lamps on Amazon, and yes its in a red tin!

Mike

I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


They also produced a small amount of Hydrogen Sulphide ,which gives the
bad-egg smell, from impurities in the Calcium Carbide.

On 16/12/2019 07:13, harry wrote:
On Sunday, 15 December 2019 21:16:48 UTC, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.

Only relatively recently they gave up selling calcium carbide in Halfords
You filled a container with it and adjusted the outflow of acetylene by regulating a water drip into the container.

The only advantage is compared with a battery, an acetylene lamp runs for much longer. Maybe no longer true with LED lamps.

Didn't Wheeler Dealers make up battery powered LED replacements to fit
in place of the carbide lamps in a Daraqs headlamps?

SteveW

On Mon, 16 Dec 2019 09:20:09 +0000 (UTC), Brian Reay wrote:

Id quite like one. I remember seeing one as a youngster and being
fascinated by the principle.

I am a bit surprised they were on sale relatively recently- at least in the
time scale of LED lamps- I was thinking more like 40 years ago but I dont
doubt what you say.

"Petzl Ariane", a modern carbide haedlamp.

Possibly discontinued, but sometimes available used.


Thomas Prufer

On Monday, 16 December 2019 09:20:12 UTC, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 21:16:48 UTC, Brian Reay wrote:
harry wrote:
On Sunday, 15 December 2019 04:43:50 UTC, FMurtz wrote:
I asked google, about a mix of propane or butane and acetylene but only
got answers around propane butane mixes, I can not believe that people
have not experimented but google seem to have decided no one would be
interested.


The reason is very simple.
Acetylene has to be dissolved in acetone for delivery because it is
unstable and only liquifies at low temperture/high pressures.

Acetylene bottles are filled with a rigid foam and ecatone. This is why
they always have to be kept upright in use.
If you lay it on it's side and open the vlve, the acetone will run out
with acetylene still dissolved but foaming as it comes out.
Very dangerous situation.

https://www.hse.gov.uk/pubns/indg327.pdf


I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars and
in caving into the 1970s at least. (I recall seeing some potholers use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.

Only relatively recently they gave up selling calcium carbide in Halfords
You filled a container with it and adjusted the outflow of acetylene by
regulating a water drip into the container.

The only advantage is compared with a battery, an acetylene lamp runs for
much longer. Maybe no longer true with LED lamps.



Id quite like one. I remember seeing one as a youngster and being
fascinated by the principle.

I am a bit surprised they were on sale relatively recently- at least in the
time scale of LED lamps- I was thinking more like 40 years ago but I dont
doubt what you say.

Yes it's strange. We used to buy it as schoolkids to mess around with. But there were no acetylene lamps around at that time so why they had any is a mystery.

On Monday, 16 December 2019 09:23:51 UTC, Muddymike wrote:
On 15/12/2019 22:30, Chris Hogg wrote:
On Sun, 15 Dec 2019 21:16:42 +0000 (UTC), Brian Reay
wrote:


I still have my carbide lamp from my pot-holing days in the early
1960's. Made by "The Premier Lamp and Eng. Co. Ltd. Leeds Eng"
I don't doubt it would still work perfectly, given a supply of
carbide. It used to be available in tall narrow red tins, say 2.5"
dia. x 8" long. It was also used in bird scarers and moisture meters.

You can still buy carbide for lamps on Amazon, and yes its in a red tin!


Yes, that's the one that was for sale in Halfords.

On 16/12/2019 09:31, Robert wrote:



I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps.Â* They were used on the early cars
and
in caving into the 1970s at least. (I recall seeing some potholers use
them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


They also produced a small amount of Hydrogen Sulphide ,which gives the
bad-egg smell, from impurities in the Calcium Carbide.

Interesting. I've only seen such lamps a few times and not noticed that.
I wonder if, for cavers etc, they produce better quality (pure) Calcium
Carbide as H2S is dangerous. I believe it was used in WW1.

Am 17.12.2019 um 11:23 schrieb harry:
[carbide]

Yes it's strange. We used to buy it as schoolkids to mess around with. But there were no acetylene lamps around at that time so why they had any is a mystery.


It was used for killing moles.

On Tuesday, 17 December 2019 11:11:24 UTC, Brian Reay wrote:
On 16/12/2019 09:31, Robert wrote:



I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps.Â* They were used on the early cars
and
in caving into the 1970s at least. (I recall seeing some potholers use
them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


They also produced a small amount of Hydrogen Sulphide ,which gives the
bad-egg smell, from impurities in the Calcium Carbide.

Interesting. I've only seen such lamps a few times and not noticed that.
I wonder if, for cavers etc, they produce better quality (pure) Calcium
Carbide as H2S is dangerous. I believe it was used in WW1.

It's also flammable and so would be burned up.

On 17/12/2019 12:52, Chris Hogg wrote:
On Tue, 17 Dec 2019 11:11:20 +0000, Brian Reay wrote:

On 16/12/2019 09:31, Robert wrote:



I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps.Â* They were used on the early cars
and
in caving into the 1970s at least. (I recall seeing some potholers use
them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


They also produced a small amount of Hydrogen Sulphide ,which gives the
bad-egg smell, from impurities in the Calcium Carbide.

Interesting. I've only seen such lamps a few times and not noticed that.
I wonder if, for cavers etc, they produce better quality (pure) Calcium
Carbide as H2S is dangerous. I believe it was used in WW1.

The acetylene from a carbide lamp always had a very characteristic
slightly sweetish smell, and no, AFAIK the carbide wasn't particularly
pure. H2S is almost as poisonous as cyanide gas, or so I was taught at
school, but when generated from a carbide lamp it's immediately burnt,
so never builds up to anywhere near a lethal concentration. Nor do I
think it would do even if unburnt unless for an extended period in a
very confined space. It's not as though you'd drop dead from the
slightest whiff of H2S, any more that you'd drop dead from the
slightest whiff of HCN (I have smelt both, and I'm still here!).


I think some people may be assuming caves are prone to be short of air
circulation. That was not my experience in the few I explored - not
even when a podgy like me was plugging a squeeze.


--
Robin
reply-to address is (intended to be) valid

On 17/12/2019 11:11, Brian Reay wrote:
On 16/12/2019 09:31, Robert wrote:



I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps.Â* They were used on the early
cars and
in caving into the 1970s at least. (I recall seeing some potholers
use them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


They also produced a small amount of Hydrogen Sulphide ,which gives
the bad-egg smell, from impurities in the Calcium Carbide.

Interesting. I've only seen such lamps a few times and not noticed that.
I wonder if, for cavers etc, they produce better quality (pure) Calcium
Carbide as H2S is dangerous.Â* I believe it was used in WW1.

ISTR that if you can smell it, it is okay, when the concentration is
higher, the effect stops you smelling it. At least that is what we were
told in "O"-level chemistry - so it could be completely wrong!

SteveW

"Steve Walker" wrote in message
...
On 17/12/2019 11:11, Brian Reay wrote:
On 16/12/2019 09:31, Robert wrote:



I dont doubt what you post etc but not that long ago in the scheme of
things, people used acetylene lamps. They were used on the early cars
and
in caving into the 1970s at least. (I recall seeing some potholers use
them
in my teens.)

They worked by producing acetylene from the reaction between calcium
carbide and water from memory.


They also produced a small amount of Hydrogen Sulphide ,which gives the
bad-egg smell, from impurities in the Calcium Carbide.

Interesting. I've only seen such lamps a few times and not noticed that.
I wonder if, for cavers etc, they produce better quality (pure) Calcium
Carbide as H2S is dangerous. I believe it was used in WW1.

ISTR that if you can smell it, it is okay, when the concentration is
higher, the effect stops you smelling it. At least that is what we were
told in "O"-level chemistry - so it could be completely wrong!

No its not. There have been a few examples of people ending
up dead in submarines and other naval vessels when the system
used to process the **** and **** has failed and some have been
killed by H2S levels that they can no longer smell.

On Wed, 18 Dec 2019 07:26:28 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

ISTR that if you can smell it, it is okay, when the concentration is
higher, the effect stops you smelling it. At least that is what we were
told in "O"-level chemistry - so it could be completely wrong!

No its not.

LOL In auto-contradicting mode again, you clinically insane,
auto-contradicting senile idiot?

--
Kerr-Mudd,John addressing senile Rot:
"Auto-contradictor Rod is back! (in the KF)"
MID: