W. Crookes on the Waz-paper. Photographic Process. 175 
sion. When practicable it is a good plan to allow water from a 
tap to flow over the sheets for a minute or two, and having thus 
54. They are then to be dried by hanging up by a crooked 
pin, as after iodizing. When dry, they will present a very 
rough and granular appearance in the transparent.parts; this is 
removed by melting the wax, either before a fire, or, what is far 
better, by placing them between blotting paper, and passing a 
warm iron over them; by this means, the white parts will re- 
cover their original transparency. 
containing any remarkable phenomena. [ will therefore now 
detail the method of printing photographie positives from these 
hegatives, premising that the process Hy 
m that usually acidpted 
oes not differ materially 
l 
t 
as the quantity required is but small, it will perhaps be found 
“better to obtain aalt 
along with the 
4 The chlorid of gold is merely required for an artistic effect. 
‘Many persons object to the reddish brown appearance of ordi- 
nary photographic positives; the addition of a little chlorid of 
old to the fixing bath converts this into a rich brown or black ; 
the trifling quantity required removes any objection to its use on 
the score of expense, oo. a 
58. I prefer using the same kind of paper for positives as 
for negatives (20). Messrs Canson n nufacture a thicker paper, 
which is generally called positive aper, but I think the thin is 
*» 
“ 
