On 1/27/20 5:07 PM, Clare Snyder wrote:

The following formula is recommended :

Aniline colour . . 10 gm. Glycerine 125 cc

Sugar . . 10 gm. Water . . . . 250 cc

Heat the water and dissolve the sugar in it ; add the glycerine in
small quantities
and stir the mixture thoroughly until each added portion is dissolved.
Beat up the
aniline colour in a small quantity of the mixture and stir into the
remainder of the
mixture. The ink is ready for use when cool. Various dyes can be used,
giving
different coloured inks.

This normal type of recording ink can be used at ambient temperatures
down to about 5° F. in the normal triangular pen, or to about €”30° F.
in a pen of the crow-quill or tit-quill type, A special ink having
the composition, water 50 cc , ethylene glycol 50 cc , methyl violet 2
cc , can be used at temperatures down to about -50' F. with the
triangular pen or -75 °F. w ith the crow-quill or til-quill pens .