114 
INDEX. 
Page. 
Water determination, figures showing 
Gooeh tubulated platinum crucible 
for 42, 43, 44 
figure showing Penfield's fire-brick and 
charcoal oven for 40 
figures showing Penfield's tubes for 39, 40 
Weber and Jannasch, boric-oxide method 
for decomposing silicates devised 
by 50 
use of oxygen blast in treatment of re- 
fractory silicates by the boric-oxide 
method 49-50 
Page. 
Weller, A., colorimetric estimation of tita- 
nium by method of 67-69 
Wells and Mitchell, cited 57 (footnote) 
Whitfield, J. E., cited 107 
Wiilfing, E. A. , cited 89, 100 (footnote) 
Zinc, determination of 60-61 
Zimmermann, C, mercuric oxi'^e method 
of separating alkalies devised by . . 100 
Zirconium, disturbing effect of , in gravimet- 
ric estimation of titanium 72-73 
estimation of 73-77 
o 
