cedure for making phosphorus from them." Actually, Gahn used at first hartshorn (Cornu cervi ustum), and Scheele doubted, until he checked it himself, that his esteemed friend was right. A few years later, Scheele corrected Gahn's assumption that the sal microcosmicum was an ammonia salt; instead, it is "a tertiary neutral salt, consisting of alkali minerali fixo (i.e., sodium), alkali volatili, and acido phosphori."
In the years after 1770, phosphorus was discovered in bones and many other parts of various animals. Treatment with sulfuric acid decomposed these materials into a solid residue and dissolved phosphoric acid. Many salts of this acid were produced in crystalline form. Heat resistance had been considered one of the outstanding characteristics of phosphoric acid. Now, however, in the processes of drying and heating certain phosphates, it became clear that three kinds of phosphoric acids could be produced: ortho, pyro, and
Is The Iron Eagle a psychotic serial killer?
When everyone reads minds, a secret is a danger... Read more
In the fall of 1984, Cold War tensions between... Read more
Author Al Macy is a character and a tightwad wi... Read more
See it as donating a moment of your social media time, every little thing helps us improve and stay online.
The list of books below is based on the weekly downloads by our users regardless of eReader device or file format.
See more popular titles from this genre.