Tabulae atomicae : the chemical tables for the calculation of quantitative analyses of H. Rose : recalculated for the more recent determinations of atomic weights, and with other alterations and additions / by William P. Dexter.

  • Dexter, William P.
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: Tabulae atomicae : the chemical tables for the calculation of quantitative analyses of H. Rose : recalculated for the more recent determinations of atomic weights, and with other alterations and additions / by William P. Dexter. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

    19/76
    in powder. The increase of weight of the silver, due to the chlorine which it takes from the perchloride of iron, gives, bj the use of the Table, the corresponding quantity of peroxyde. No. 15 indicates the quantity of protoxyde of iron in a combina- tion of the oxydes, by the metallic gold reduced from a solution of the auro-chloride of sodium. The sixteenth series is for the calculation of the oxydes when combined with phosphoric acid, according to the process of Fuchs. It will be seen, by an examination of the figures of these different series, that, in the reduction of the oxydes by hydrogen, a small error in the performance of analysis leads to a large one in the es- timation of the oxydes. The error is proportionably diminished in the process by sulphuretted hydrogen, and still more by the use of the powdered silver; but it is reduced to its lowest limits when the determination of the protoxyde is effected by means of the auro- chloride of sodium. Table XXXI. No. 15. — For the estimation of the amount of the peroxyde con- tained in the manganese of commerce, by the usual process with oxalic and sulphuric acids. By the use of the table, the necessity of operating upon any par- ticular weight, in order to simplify the calculation, is avoided; and the result will be far more accurate than if the carbonic acid evolved be taken, as is usually done, for the equivalent of the per- oxyde contained in the sample. Table XXXIII. The last six lines of this Table have been computed, at the sug- gestion that they would be of use in determining, for technical pur- poses, without the labor of a calculation, the quantities of the several salts of soda contained in the articles of commerce. Table XXXV. Nos. 12,13. — For the determination of nitric and nitrous acids as sulphate of baryta.