172 W. Crookes on the Wax-paper Photographic Process. 
Sie 
ges an eee 
42. In the following bath, I have endeavored so to adjust the 
rtion of nitrate of silver, as to avoid as much as possible 
Poth the inconveniences mentioned above, 
Nitrate of silver . : j ; 800 grains. 
Glacial acetic acid ; : . 2 drachms. 
Distilled water 
The nitrate of silver and acetic acid are to be added to the water, 
and when dissolved, filtered into a clean dish (10), taking care 
that the bottom of the dish be flat, and that the liquid cover it 
to s de th of at least half an inch all over; by the side of this, 
be: nila dishes must be placed, each containing distilled 
Re ne ee ee > 
rs "A sheet of iodized paper is to be taken by one end, and 
gradually lowered, the marked side downwards, on to to the exci- 
ting solution, taking eare that no liquid gets on to the back, and 
no air bubbles are enclosed. 
It will be necessary for the sheet to remain on this bath from 
five to ten minutes; but it can generally be known when the 
operation is completed by the change in appearance, the pink 
color entirely disappearing, and the sheet assuming a ne homo- 
geneous straw color. When this is the case, one of it 
must be raised up by the platinum spatula, lifted out “of be dish 
with rather a quick movement, allowed to drain for about half a — 
minute, and then floated on the surface of the water in the second 
dish, while another iodized sheet is placed on the nitrate of silver 
solution ; when this has remained on fora sufficient time, it — 
must be in ike manner: transferred to the oe: of distilled water, 
— removed the previous sheet to the n y 
third iodized sheet can now be excited, ead when this 
is sainlitett the one first excited must be rubbed erfectly dry 
between folds of clean blotting paper (14), wra up in clean 
r, and preserved in a portfolio until required for use; an 
the others can be transferred a dish forward, as before , taking 
care that each sheet be washed twice in distilled water, and that. 
at every fourth sheet the dishes of washing water be emptied, 
and replenished with clean distilled water ; poh water should —_ 
be thrown “ne but preserved in a bottle fora subsequeay 
operation (49 i 
45. The x quantity of the exciting bath, will be fou : 
quite — to excite about fifty sheets of the size here em 
ig 3000 Ss ise inches of paper. After the —_ Foon 
Pe mE Le ag SR IN ee TIE Oe nd ND Ce Rae meee 
sens 
ness. Generally, mrifibient attention is 9 pone to this oink 
It should a borne in mind, that an amount 
the paper were only exposed to its action for a 
