178 J. M. Ordway on Waterglass. 
course of two days it formed a thin jelly. 
drained, squeezed, and hard pressed, and ae 
product contained 21 p, c. of mother liquor and 36 p. c. of Na, Sa, Siro. 
These three trials show something of the influence of dilution, 
though in the case of c longer standing had also modified the 
composition of the coagulum by increasing the amount of stat- 
nic oxyd rendered insoluble. 
2Si, There was no change at first, but in the course of two days it 
became a thin opaline jelly. After seven days being hard pressed It 
yielded a translucent cake weighing 8°6 g. and containing 37 p. ¢. net of 
Nag Sn; Si, 3. 
9, 6. A similar mixture was made by adding a saturated solution of 
stannate to fused crystals of silicate and evaporating till it contained 40 
p-¢. of solid matter. It remained clear, and when exposed to severe 
cold showed no sign of crystallization. 
10, A mixture was made containing somewhat over 16 p. % of 
Na, Sn Sig, There was no change for six weeks. 
-_ 11,a. A mixture was made so as to contain about 16 p. ¢ ae 
Ks; SnGi. ‘There was to chiange,for some days, but in the course Of * 
# 
SO. saan 
