78 Paper Process in Photography, [no. 1, new series, 
of the Silver solution, when the detail is nearly all visible ; on the 
contrary, if the sky line be entirely invisible add of the Aceto- 
nitrate solution. 
Tilt the tray to and fro half a dozen times to ensure the perfect 
mixture of the solution, or you will have patches of unequal de- 
velopment. 
Float the marked side of the paper on this as before described, 
and be careful that no portion of the solution is allowed to touch 
the back of the paper — should this unfortunately happen, as it 
sometimes will notwithstanding every precaution, instantly reverse 
the paper and wet the whole of the back as the only way to avoid 
a stain — turning it again as soon as the b^ck is wetted thoroughly 
and developing by immersion. Should there be an insufficiency of 
Gallo-nitrate to cover the paper well, get an assistant to pour in 
more whilst you hold the paper, replacing it face downwards as 
soon as the solutions are mixed. 
The sky and most strongly illuminated parts of the picture first 
appear, then the portion more in shade. When the darker parts 
become visible through the back, lift one end between yourself and 
the light, if the detail in the least brightly illumined parts is at all 
visible, take it up and examine it carefully. If satisfied that you 
have obtained as much detail in the shadows as can be done with- 
out too much intensifying the high lights, remove the paper at 
once to a pan of clean water and plant it face downwards to allow 
any decomposed Gallo-nitrate to fall to the bottom of the pan, 
then pour off the water or, what is better, remove the negative to 
another vessel of clean water. If from the length of time occupi- 
ed in the development or any other cause, decomposition of the 
Gallo-nitrate has taken place to any extent, the face of the nega- 
tive may be very cautiously brushed with a small camel's hair 
brush. After washing in 4 or 5 changes of water for half an hour 
remove it to the fixing solution. 
Fixing Solution. 
This consists of 3 or 4 ounces of Hypo-sulphite of Soda to 1 
pint of clean (not distilled) water — in which the negative is to be 
left until all the yellow Iodide of Silver is dissolved, this can only 
be ascertained by daylight which will not hurt the picture after 
