Volume 1
A treatise on chemistry / by H.E. Roscoe and C. Schorlemmer.
- Henry Enfield Roscoe
- Date:
- 1877-1892
Licence: Public Domain Mark
Credit: A treatise on chemistry / by H.E. Roscoe and C. Schorlemmer. Source: Wellcome Collection.
642/792 page 626
![-METALUC ELEMENTS. THE NON ns that of the oxygen which is needed to pro- duce it. This fact may readily be shown by help of the apparatus which is shown in Fig. 96, under sulphur dioxide, the ex- periment being conducted as there described, except that a small piece of freshly-heated charcoal is placed in the small combustion pan instead of sulphur. The mole- cular weight of the gas, calculated from its den- sity, is 44, and it contains two volumes of oxygen, as the above experiment shows; hence its mole- cular formula will be CO,. Dumas and Stas1 have confirmed this result by careful analysis, and these chemists have, at the same time, accurately as- certained the combining weight of carbon. For this purpose they made use of the apparatus which is shown in Fig. 186, in which they burnt diamond and purified graphite in a stream of oxygen gas. The carbon dioxide formed was com- pletely absorbed by means of caustic potasb, and the composition of the carbon 1 Ann. dc Chim. cldc Physique, [1] xl. Ml. I](https://iiif.wellcomecollection.org/image/b28122409_0001_0644.jp2/full/800%2C/0/default.jpg)
