Encyclopedia of Practical Receipts and Processes

How to silver a mirror, brew ginger beer, kill moths, make fireworks, tan a hide, bronze iron, cure a ham and clean a straw hat: William B. Dick's numbered encyclopedia answered the questions a nineteenth-century household actually had.

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To Obtain Sulphurous Acid

1.0206 2.446 In the gaseous form this acid is freely evolved 1.0140 1.63 by burning sulphur in air or in dry oxygen. 1.0074 0.8154 It is also given off during the digestion of metals in hot sulphuric acid. When charcoal,

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