J. M. Ordway on Waterglass. 185 
Arr. XXI.— Waterglass ; by Joun M. Orpway. Part IV. 
[Continued from yol. xxxiii, p. 36.] 
Its Precipitation by alkaline salts, 
deposits to be mere silica. uhlmann, on the other hand, 
pportunity was sought, to investigate the subject in earnest, 
and either establish or set aside the provisional statement. 
. m 
them otherwise unaltered. ence, in every instance, the amount 
o% each constituent of the solid product may be mad 
unknown quantities,—one expressing the portion belonging to 
liquor retained. Analysis gives the sum of the two portions of 
can cient but the positive ratio of these parts to each other 
eee see which gives results squaring most completely with 
| the ascertainable facts. The following detailed examples 
Will serve to illustrate the nature of the problem and the mode 
eber ein neues nutzbares Produkt aus Kieselerde und Kali. : 
a ‘rhea carbonates, as will be oe oh 4 ong nae on bags I 
aims to preéminence as precipitants. possible that Fuchs b 
ery the bicarbonates, which many chemists once regarded as normal. 
This J. te 
ournal, [2], xxxii, 340. 
