74 
POPULAR SCIENCE REVIEW. 
Producing Colours. — Mr. A. P. Price , patentee. — Here the inventor 
takes a compound or combination of aniline, consisting of aniline com- 
bined in equivalent proportions with any of the following acids ; namely, 
acetic, valerianic, lactic, benzonic, cinnamic, tartaric, and oxalic acid, 
such compounds being either obtained by, or resulting from, direct combi- 
nation of equivalent proportions of acid and aniline, or obtained by means 
of, or resulting from, double chemical decomposition. He mixes any one 
of these compounds or combinations, so resulting or obtained, or mixtures 
of them, with the substance known in Germany and France as fuchsine, 
and corresponding with those products obtained from aniline know in this 
country as magenta and rosaniline, and he heats the same together by 
preference at a temperature of from 150° to 190° centigrade, until the 
desired blue colour free from violet is produced. 
Green Colouring Matter.— Mr. W. GlarJc , patentee. — This inven- 
tion consists in preparing a green colouring matter from aniline, which 
is soluble and suitable for dyeing and printing purposes, by means of a 
combination of reducing agents, such as hydrates and soluble hyposul- 
phites acting on acidulated solutions of salt and rosaniline, or on the blue 
or violet compounds derivable from the same. 
Fixing Colours in Printing Calico. — Mr. B. Penney , patentee .' — 
This invention relates to fixing those colours employed in printing calico 
and other fabrics which are produced by means of catechu. The patentee 
employs a solution made in the following manner, and treats the catechu 
colour therewith he takes of the ordinary chloride of calcium of com- 
merce (which may be made by saturating spirits of salts with quicklime 
in a powdered state) three, four, five, or other number of parts, and 
mixes therewith one or other required number of parts of nitrate of copper, 
at 80 deg., or other required strength, or of chloride or muriate of copper, 
either instead of nitrate of copper, or in combination therewith ; such 
admixture is to be made whilst the calcium is in a heated state, and then 
filtered for use. These parts must be^varied according to the depth,' shade, 
or tone of colour to be treated. 
Manufacture of Sulphate of Soda. — Mr. B. A. Brooman, patentee. 
When a mixture of coal, sulphuret of iron, and chloride of sodium is 
heated in the presence of air, sulphate of soda, oxide of iron, and chloride 
of iron are formed; the proportion of these different bodies varies with 
the quantities of the substances above named forming the mixture, as 
also the state of division when used. This invention consists in manufac- 
turing sulphate of soda by reducing to a powder the fuel (charcoal, coal, 
coke, or other fuel), the natural or artificial sulphuret of iron, and the 
salt, and in mixing these substances in certain fixed proportions. 
Purifying, Bleaching, and Refining Oils. — Mr. B. White, patentee. 
This invention consists in introducing the oil, or oily or fatty matters, 
with a re-agent calculated to eliminate or separate the impurities contained 
in them, into a vessel having small orifices or perforations in its sides, 
and revolving rapidly within a larger vessel, whmh is open to the atmo- 
spheric air, so that when the smaller vessel revolves, the oil, or oily or fatty 
matter combined with the re-agent which is used with it, will be projected 
through the orifices in the sides of the smaller vessel in thin streams, 
