OCT. — DEC. 1856.] Pai^er Process in Photography. 73 
Let pure milk from the cow stand until it is sour, for each quart 
of milk beat up the whites of three eggs ; add these to the milk in 
any convenient vessel, porcelain is best — if brass or copper uten- 
sils be used they should be well tinned. Boil gently over a slow 
fire for a few minutes and the caseine will be taken up by the 
coagulated albumen. AVhen cold, filter through a double fold of 
cambric, and then through bibulous paper, the latter is a tedious 
process unless the operator has a large funnel which he can fill and 
leave whilst he is attending to othei* matfers. If properly made it 
should be clear and transpareiU and of a straw colored tint. 
To each ounce of whey or distilled water add the following in- 
gredients — » 
Iodide of Potassium. grs. 7J 
Bromide of Potassium. . , „ 2§ 
Cyanide of Potassium „ 0,% 
Chloride of Sodium, dry, (table salt) „ OJ 
Sugar of Milk „ 12 
Crystallised Honey (from the bottom of ajar).. . „ 5 
Dissolve, and add to the mixture as much re-sublimed Iodine 
as will produce a brown sherry color: try 10 or 12 grs. to the 
quart of 40 ozs. — and if that is found insufficient, add more, as the 
exact quantity is of no importance. The Iodine being rapidly ex- 
tracted from the solution by the starch in the paper will require to 
be renewed occasionally, the necessity being indicated^^by the pale- 
ness of the solution. It is some hours before the whole of the 
Iodine is dissolved. 
Filter the above solution into a dish to the depth of one inch, 
or more if the dish is deep enough. Take a paper by two adjacent 
corners and place the other end upon the solution so as just to 
touch it, without pause lower the hands gradually and carefully to 
exclude air bubbles, for the better seeing of which the iodizino- 
tray should be placed between the operator and a window. Let the 
paper lie for a moment until it is wetted, then take it up by the 
corners nearest to you and place the other side of the paper upon 
the solution in the same way. Then by the help of a bent glass 
rod, or by tilting the tray, cause the solution to flow over the paper. 
K 
