1867 Six Hundred Receipts by John Marquart

GOO MISCELLANEOUS VzVLUABLE RECEIPTS.

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2d. Construct 5 sheepskin cups, of tlie same liei^'lit as the copper ones and 3J inches in diameter. Set them inside the copper cups. od. Make 5 zinc cylinders, 4J inches high and 2J Indies in diameter, o[)en at each end, and place them inside the sheepskin cups, with copper sockets at- tached to them, as with the copper Ciips. 4th. After placing the cups thus formed in a con- venient position, connect them together with copper wires, as follows: — The first copper cylinder with the second zinc; the second copper with the third zinc; the third copper with the fourth zinc; and the fourth cop[)er w^ith the fifth zinc; observing always to con nect the copper with the zinc. How to charge the Baticvri. — Fill the cups within about haif an inch of the to [> with watery then put 1 tcaspoonful of Glaul.er's salts intt) eacli of the sheep- skin cups, between the zinc and slieepskin ; then put 1 teaspoonful of blue vitriol into each of the copper cu[)S, which, wdien dissolved, will charge the battery for some days. Introduce tlie conducting- wires, and it is ready for action. To prepare the Gold Solution. — Dissolve the gold in tw^o parts of muriatic acid with one of nitric acid. Then evaporate it to dryness, and redissolve the powder in the proportion of 1 gill of pure water to 1 pennyweight of gold. Boil it a few minutes, and then add -J ounce prussiate of potash : boil it 5 or 10 minutes. Let it cool and settle; then pour it ofi", and it is ready for use. N".B. — Dissolve silver in nitric acid, and pursue the same process as Avith the gold. Prepare a solution by dissolving 1 ounce prussiate of potash in 1 quart water. Put a sufficient quantity of it in a