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BERZELIUS, JONS JACOB - ONE OF THE MOST IMPORTENT WORKS IN THE HISTORY OF CHEMISTRY - THE FRENCH VERSIONBiblio.com

Essais sur les proportions déterminées dans lesquelles se trouvent réunis les élémens de la nature inorganiques. Suite des experiences sur les proportions déterminées d'après lesquelles les élémens de la nature inorganique s'unissent. In all.

1811ref. 46030Paris Chez J. Klostermann fils 1811-12. Bound in 6 contemp. hcalf. Gilt spines slightly rubbed. Wear to top of spines. In: "Annales de Chimie ou Recueil de Mémoires concernant la Chemie" Tome 78 79 80 81 82 and 83. Entire volumes offered. The 14 parts: Tome 78: pp. 5-37 105-132 217-242. - Tome 79: pp. 113-142 233-264. - Tome 80: pp. 5-37 225-258. - Tome 81: pp. 5-36 278-303. - Tome 82: pp. 5-33 113-125 225-72. Tome 83: pp. 5-35 a. pp. 117-127. With in all 3 engraved plates. Some scattered brownspots. The papers represents one of the first announcements of Berzelius' discovery of the fixed chemical proportions determining the weights and valencies of the various constituent elements in inorganic compounds. The papers were published at the same time in Swedish German both here in Annalen and in Schweiger's Journal and in French. By running many hundreds of analysis of chemical compounds he gave so many examples of the law of definite proportions that the world of chemistry could no longer doubt its validity and in so doing he gave experimental evidence to the atomic theory. He hereby laid a solid fundation for the further development of chemistry. A reprint is found in Ostwald's Klassiker der exakten Wissenschaften No. 35.According to Söderbaum Jac. Berzelius 2 p.12 "It was a giant work one of the most importent in the history of chemistry which was here presented. One is even more impressed when one remembers that it was a pioneer undertaking in every sense of the term. Analytic and synthetic methods existed before Berzelius' time to be sure but there were no precise methods of the sort which he required. They all had to be elaborated at the cost of time and labour."J. Erik Jorpes "Jac. Berzelius" p.45."In general Berzelius's efforts were directed toward the consolidation and extension of the atomic theory. He improved chemical analysis and determined the composition of a large number of compounds thus verifying the laws of constant and multiple proportions and furnishing the most accurate equivalent weights then available. By ingenious methods he arrived at the correct atomic composition of most common substances and thus was enabled to draw up in 1826 a table of atomic weights very nearly identical with the modern one."Leicester & Klicktein "A Source Book in Chemistry" p. 258.Parkinson "Breakthroughs" 1810-20 C. unknown

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FARADAY, MICHAEL - THE DISCOVERY OF ELECTRO-MAGNETIC INDUCTION (PMM 308) - GERMAN VERSIONBiblio.com

Experimental-Untersuchungen über Elektricität. Frei übersetzt aus dem Philosop. Transact. f. 1832. Erste- Zweite Reihe. § I-V. I. Vertheilung elektrischer Ströme. II. Electricitätserregung durc Magnetismus. III. Neuer elektrischer Zustand der M.

1832ref. 44146Leipzig Johann Ambrosius Barth 1832. Contemp. hcalf. raised bands gilt spine. Light wear along edges. In "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff" Band 25. Entire volume offered. VIII648 pp. and 6 folded engraved plates. Small stamps on verso of titlepage and plates. Faraday's papers: pp. 91-142 a. pp. 142-186. with 3 folded engraved plates. Clean and fine. First German editions of the 2 first memoirs of Faradays groundbreaking researches on electricity constituting the first 2 papers of his "Experimental Researches in Electricity" and containing his fundamental discovery of electromagnetic induction THE FOUNDATION OF NEARLY ALL THE ELECTRICITY IN USE TODAY. In 1820 Oersted had generated magnetism from electricity Faraday here finds the opposite effect generating electricity by magnetism. He also described the first electrical generator second paper. THESE PAPERS ARE SOME OF THE GREAT CLASSICS OF CHEMISTRY AND PHYSICS."Faraday demonstrated this theory involving the lines of force.by inserting a magnet into a coil of wire attached to a galvanometer. While the magnet was being inserted or removd current flowed through the wire. If the magnet was held stationary and the coil moved over it one way or the other there was current in the wire. In either case the magnetic lines of force about the magnet were cut by the wire.If the magnet and coil were both held motionless whether the magnet was within the coil or not there was no current.Faraday hd thus discovered electricalinduction.It was to lead to great things but this was not apparent."Asimov."Although his discovery of the electric motor and the dynamo was almost entirely identical to his theoretical discoveries it laid the foundation of the modern electrical industry - electric light and power teælephony wireless telegraphy televison etc. - by providing for the production of continous mechanical motion from an electrical source and vice versa." PMM 308.Horblit 29 - Milestones 62. - Dibner 64. - PMM 308.The volume contains further notable papers. Elie de Beaumont "Zweiter geologischer Brief.an A.v. Humboldt über die relative Alter der Gebirgszüge" pp. 1-58 a. 2 plates one handcoloured papers by Döbereiner E. Lenz Moser Mitscherlich de Saussure J. Dumas F.E. Neumann Gay-Lussac Johannes Müller "Beobachtungen zur Analyse der Lymphe des Bluts und des Chylus" pp. 513-590. hardcover

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