Potash, pyrophosphate or phosphate of:

Used in a depositing solution;
Du Bois, 56.
Piaget, 56.

Fontainemoreau, 62, 96.
Roseleur, 66.

Potash, stannate of:

Used in a depositing solution;
Newton, W. E., 81.
Peppé, 153.

Potash, sulphate of :

Used in a depositing solution;
Fontainemoreau, 62.

Potash, sulphite of:

Used in a depositing solution;
Woolrich, 45.

Potash, zincate of:

Used in a depositing solution
Newton, W. E., 81.

Potassium and mercury, cyanid

of:

Used in a depositing solution
Leeson, 43.

Potassium, chloride of:
Used as a flux;

Grissell, 68. Redwood, 68.

Puddled steel:

Used to manufacture tin plates;
Spence, 139.

Pyroligneous spirit:

Used in a depositing solution;
Wall, 133.

Pyrophosphate or phosphate of
potash. See Potash, pyro-
phosphate or phosphate of.

Pyrophosphate or phosphate of
soda. See Soda, pyrophos-
phate or phosphate of.

Quicklime. See Lime.

Quicksilver. See Mercury.

Racemic acid:

Used in a depositing solution;
Becker, 129.

Rhodium, plating or covering
metals with:

By electric force;

Smee, xx.

By simple immersion in an aqueous
solution;

Wollaston, xvii.