 | George Gregory - 1796 - 682 páginas
...united with vitriolic acid, forms that common and well known fubftance called ALUM.. The STWTTJif t« of the Greeks, and the alumen of the Romans, was a native fubftance, and differed much from the fait of which I am now treating. The varieties mentioned by Diofcorides... | |
 | George Gregory - 1798 - 582 páginas
...united with vitriolic acid, forms that common and well known fublbince called ALUM. The IrtTTHf ia of the Greeks, and the alumen of the Romans, was a native fubftance, and differed much from the fait of which I am now treating. The varieties mentioned by Diofcorides... | |
 | Thomas Curtis - 1829 - 842 páginas
...System of Chemistry, vol. ii. p. 272, he has the following remarks on this substance: 'The yrvirrripta of the Greeks, and the alumen of the Romans, was a...period, or by what means the discovery was made is unknown." ' The composition of alum has been but lately understood with accuracy. It has been long... | |
 | Sheridan Muspratt - 1860 - 324 páginas
...part. From the researches of Professor BECKMANN, it appears that alum was discovered by the Asiaties; but at what period, or by what means the discovery was made, is altogether unknown. This salt affords a striking instance of how readily one may be deceived in giving names without proper... | |
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The eruTT7)2/a of the Greeks, and the alumen of the Romans, was a native substance which appears to have been nearly related to green vitriol, or sulphate of iron; and which consequently was very different from what we at present denominate alum. 