STUDIO AND WORKROOM 7 
C. Blue carmine 1.0 per cent solution 
D. Methyl violet 0.1 per cent solution 
A gives a bright yellow paper, and one thickness is suitable 
for development papers. Two sheets of B and one of A 
are suitable for bromide papers and slow plates. Two of C 
and one of A are suitable for panchromatic plates, if not too 
bright a light be used; another A makes it safer. One of A 
and one of C may be used for ordinary and orthochromatic 
plates (Namias). 
ALCOHOL.—In several formulas “alcohol” is recommended 
as an ingredient, although under the prohibition act it is 
impossible for the average person in the United States to 
obtain this in any legal manner. In some cases ordinary 
denatured alcohol may be used, but in others as, for instance, 
the colour-sensitisi#e of plates, this is worse than useless 
because it has a very prejudicial effect on the emulsion. It 
is possible to obtain from chemical and bacteriological supply 
houses pure methyl alcohol under the names of Eagle 
methanol, or Columbian methanol or spirits, or methyl alco- 
hol C. P., and these may be substituted in nearly every case. 
