In article , Brian G
scribeth thus
tony sayer wrote:
Http://www.fresh99.com/ladders.htm

scroll past the forth one slowly;!...

A number of optical illusions in there - along with some standard practices
for the job.

Take a look a how Fred Dibnah used to erect his ladders to access the
chimneys he worked on!

What's the matter with the fourth one?



Well earthed perhaps;?....
--
Tony Sayer