The book of Useful Receipts, And Manufacturer's Guide
The book The book of Useful Receipts, And Manufacturer's Guide was written by author Johnson, [from Old Catalog] Here you can read free online of The book of Useful Receipts, And Manufacturer's Guide book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The book of Useful Receipts, And Manufacturer's Guide a good or bad book?
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Dissolve a few crystals of s;ilphnte c-f cop- par, which is composed of copper, oxygen, and siilphiuio acid, in a cup of water ; throw into it a silver coin, and leave it there for a fdw moments. Ou lifting it ont, the coin is as bright as it was befoi'e. But create an electrio current through the sulphate of cop- per solution by touching the coin with a slip of zinc as it lies at the bottom cf the cup, and you will sliortly find a deposit ot met- allic cojjper covering the silver. By im- mersi...ng the zine in the sulphate of copjier solution we have created a current of electri- city, which passes through the liquid, de- composing it, tiie copper going to the silver, and the otlier components of the sulphate of copper — sulphuric acid and oxygen — going to the zinc, which is gradually dissolved. Now V, e may do precisely the same thing with our Smee's pair. We may conduct the electricity generated by means of wir«;s into a solution of sulphate of copper, and decom- pose it, one wire becoming coated with cop- per like the dime, and the other becoming oxidized, and dissolving iu the liberated sul- phuric acid.
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