Cyanide of silver dissolved in solvent solution (No. 1). This is the solution generally employed for plating with a separate decomposition cell.
3. Gold solution. Add to a pint of No. 1 oxide of gold, 1⁄4 oz. Used in the same manner as the second silver solution.
Cyanide of gold dissolved in solution of cyanide of potassium (No. 1). Used as last.
4. Platinum solution. The double chloride of platinum and potassium, dissolved in solution of caustic potassa. Other solutions have been proposed, but this appears to be decomposed with the greatest ease.
The above sketch of the electrotype art is necessarily very imperfect. For minute details respecting manipulation, the reader is referred to the excellent treatises on the subject that have been written; more particularly to Ernest Spon’s valuable work, entitled ‘Workshop Receipts.’
ELEC′TUARY. Syn. Electuarum, L. Electuaries (ELECTUARIA) are formed of light powders, generally vegetable, mixed up with honey, syrup, or sugar, to the consistence of a stiff paste. In the present Pharmacopœia they are included under the title Confection, but this arrangement is manifestly improper, as the words are not synonymous. In Conserves and Confections the addition of the saccharine matter is in much larger proportion, and is designed to preserve the vegetable matter; in Electuaries, the syrup is designed merely to communicate the required form. (Dr Murray.)
The preparation of electuaries is similar to that of confections and conserves, and the same precautions must be observed to reduce the dry ingredients to very fine powder before adding them to the syrup or other substances used to give them form. Care must also be taken to diffuse the ingredients equally through every portion of the mass, by patient and laborious stirring. The neglect of this point has often led to disagreeable consequences, from some portion of the electuary being nearly inert, while another portion has possessed increased activity. See Confection, Conserve, Linctus, &c.
Electuary of Ac′etate of Potassa. See Conserve.
Electuary of Al′um. Syn. Electuarium aluminis, L. Prep. 1. (Phœbus.) Alum, 1 dr.; extract of logwood, 4 dr.; balsam of Peru, 6 drops; water of sage, q. s. Astringent and antiseptic; in diarrhœa, sponginess of the gums,
&c.