Authentic Science Fiction Monthly No. 44 — page 148: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

Chemical Analysis fet at Home E Third and last in a series of articles on this subject | We have covered the so-called preliminary tests and we have dealt with the identification of the metals in a substance to be analysed. Now we have to look at the non-metals. These are such elements as carbon, sulphur, chlorine, hydrogen, oxygen. Very rarely are non-metals found in a substance uncombined. Nearly always they are linked up with other non-metals to form the so-called “acid radicles.”” Rust, for example, is a compound of iron and oxygen, and here the non-metal occurs alone. So does the non-metal chlorine when it is tagged onto an atom of sodium in common salt. But in the case of, say, gypsum, the molecule is rather more complicated. Here the metal is calcium, and attached to it is a group of five atoms. Of these five, one is sulphur and the other four are oxygen. 147 comiclooks.conn