21G 
BRITISH PHARMACEUTICAL CONFERENCE. 
French name “ eau gazeuse ” was a much better one to apply to the beverage that did 
not contain an appreciable quantity of the alkali. 
Mr. Atherton named having found about five grains of soda per bottle. 
Mr. Ince insisted strongly that the soda-water of science and of commerce were two 
different things, and it was useless to attempt to reconcile them. The public got what 
they wanted in the soda-water of commerce. 
Mr. J. D. Smith said it would be highly interesting if soda-water manufacturers would 
let the public know what soda-water contains. 
Mr. A. J. Caley said that four years ago they manufactured soda-water with fifteen 
grains of soda per bottle, and people complained and said, “ What is the matter with 
this soda-water—it tastes like soap.” They then decreased the quantity of soda, and in 
proportion as they did so their trade increased. He could not state the exact quantity 
now dissolved, but perhaps it was the fraction of a grain. He thought it very desirable 
that people should not be supplied with soda-water with fifteen grains of soda in it, which 
he hinted might not be conducive to health. If a prescription, however, were ordered 
by a physician soda-water of a definite strength would be supplied. 
Mr. Guyer objected to the assumption that no soda was present in soda-water. He 
knew large makers who asserted that they used ten grains per bottle. 
Professor Attfield said that another paper on the same subject would have been pre¬ 
sented but for the illness of the member who had undertaken the investigation. 
DESCRIPTION OF AN AUTOMATIC ARRANGEMENT FOR CON¬ 
TINUOUS FILTRATION AND WASHING PRECIPITATES. 
BY HENRY B. BRADY. 
[A working model of the apparatus was exhibited, and an extempore de¬ 
scription was given, of which the following is a summary. As the arrange¬ 
ment requires modification for the two distinct operations for which it is de¬ 
signed, it will be necessary to give a separate description of each form. 
Woodcuts No. 1 and No. 2 illustrate the subject.] 
Continuous Filtration (Fig. 1). 
