Chemical Lectures of H.T. Scheffer by Torbem Bergman, J. A. Schufle (auth.), Torbern Bergman

By Torbem Bergman, J. A. Schufle (auth.), Torbern Bergman (eds.)

Torbern Bergman was once one of many maximum chemists of the 18th century. He edited this selection of lectures in chemistry via H.T. Scheffer and released it in 1775. It used to be most likely the 1st booklet designed for use as a textbook for college sessions in chemistry. Bergman provided the 1st of his successively stronger Tables of optional sights during this ebook, a desk of the chemical parts which was once one of many earliest makes an attempt to give the entire chemical parts and their homes in one desk. This desk preceded the fashionable periodic desk of the weather by means of approximately a century. it truly is of foundation of this desk that Bergman is taken into account to be the daddy of actual chemistry.
one of many many discoveries defined during this ebook is Scheffer's `Pelican Experiment'. which disproved the transmutation of parts, and preceded by means of twenty years the same scan performed via Antoine Lavoisier.
This ebook should be of curiosity to historians of technology and chemists particularly. Scientists typically and educators may also be to learn this ebook. it may be used as extra analyzing in heritage classes.

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Because pure acids are not found in the solid state, they cannot be placed here (§§ 1,2). Note. It is shown immediately from the above that solidity is not an essential property of salts, and thus acids should be classified here first of all since they are seen to be more saline than the others, that is they have solubility and taste to a higher degree. ] uses Neutral[salts] and Medium-salts [Medelsalter] as synonyms, as they are commonly used, but these terms can be used to denote two different combinations; the first [combination] to distinguish salts of acids combined with alkalis, which are well suited to reveal the taste or reactions of either of the ingredients and therefore shall receive the name Neutral-[salts]; whereas if earths are dissolved to saturation, there is usually found still clear eVidence of solvent or base, and such composition is therefore not improperly called Medium-salts [Medelsalter], because they have a sort of medium quality, but can still be brought to full neutrality.

N his Foreword to "Scheffer's Lectures", Bergman says: Many years ago the head of the Swedish Board of Commerce. and Knight of the Royal Order of Was a, Mr. P. left Figtr. 1. A pelican. III1I ... ,,,,,, , HEM 1/ T. RS CHEMI ICE FORELAsI L GAR, Romnde ~ALTER, JORDARTER ,VATTEN. FE"ThIllR . ER. J•. rknn,«or utg,fnc. ko/hu,d t; , UP3ALA . ndl ..... [. ari. Koo,cl And. h OI 80iIr l71ti . Figure 2. Title page few "Scheffer's LectIEM'· Reprinted from Journal of Chemical Education. Vol. 63, page 928.

CHAPTER II. About Acids the color is still heavenly blue; more water gives a colorless acid. We sometimes get entirely different colors merely through phlogiston spreading or thinning out. and this was qUite mysterious with green or blue nitric acid. and the Alchemists made much to do about this. The brown color undoubtedly comes from phlogiston. and can be distilled off on a very slow fire. so that what remains is like clear water but growing yellow again if ever so little phlogiston gets in; indeed Mr.

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