The book A Recalculation of the Atomic Weights was written by author Frank Wigglesworth Clarke Here you can read free online of A Recalculation of the Atomic Weights book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Recalculation of the Atomic Weights a good or bad book?
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LEAD. 127 LEAD. For the atomic weight of lead we have to consider experiments made upon the oxide, chloride, nitrate, and sulphate. The researches of Ber- zelius upon the carbonate and various organic salts need not now be considered, nor is it worth while to take into account any work of his done before the year 1818. The results obtained by Dobereiner* and by Longchamp f are also without special present value. For the exact composition of lead oxide we have to depend upon the researches of Be...rzelius. His experiments were made at different times through quite a number of years ; but were finally summed up in the last edition of his famous *' Lehrbuch. " J In general terms his method of experiment was very simple. Perfectly pure lead oxide was heated in a current of hydrogen, and the reduced metal weighed. From his weighings I have calculated the percentages of lead thus found and given them in a third column : Earlier Results. 8. 045 g rm - PbO S ave 74675 grm. Pb. 92. 8217 per cent.
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