5
The production of this curious substance is explained in an article on the 'Value of Rubbish,' No. 385.
6
Notwithstanding this, we were assured by a gentleman connected with the copper-works, that there is no specific disease arising from copper-smelting, as in the case of lead. Asthma, rheumatism, and colds, are the prevailing affections among the men; and even these are in a great measure due to their own carelessness.
7
Political Economy: Chambers's Educational Course.