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Notes of Lectures by R. B. Farquhar
James Findlay Roger B Farquhar
Washington Co Maryland 1852 June 10th 1852
James Findlay's Book R. B. Farquhar [illegible] Boarding School
James Findlay Washington Co Maryland
Alexandria, Virginia 1851
Roger B Farquhar Alexandria Boarding School Alexandria Va
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Chemistry Lecture 21st [6?] It has been stated before that Natural science is divided into two branches: one of these has already been [treated?] of under the head of Natural Philosophy by the other Chemistry we are now about to commence upon. The phenomena produced by the latter are easily distingued from those of the former; those are a change of place and are accompanied by sensible motion: Carbonic and gas, the first affirmed body besides atmospheric air was discovered by Dr. Black in 1756; indeed all the most important discoveries in chemistry are of comparitively recent date. A few years since it was ascertained that [actual?] charcoal obtained by burning bones in the same way as wood was excellent for purifying sugar. The coal after use was considered useless, but the person whose business it was to remove it discovered in in some [refuse?] sugar and from this he obtained vinegar. The charcoal after the second process was supposed to be utterly useless yet a physician in Phila [Philadelphia] a friend of the lecturer and a farmer, by analysis found in it phosphate of [?]; he then applied it to his land and obtained the results which every farmer knows will [plow?] its application so worthless as an old shoe to make prussiat of potash By Chemist[ry?] the science of medicine has advanced very much, Dumas found that by the bite of a certain red ant was very painful; he and Licbig analyzed the ant and obtained a substance which they formed formic acid from this though obtained in a different manner is chloriform procured which has been used with such wonderfull success in surgical operations. These