ft. Bunsen on the Washing of Precipitates. 331 
IV. 
After ten decantations. 
Time required in washing -..----.-- 180’ 
Weight of the precipitate sasha Ne 0°2443 orm. 
Volume of wash-w i! 1750 cub. centims, 
By filtration with the eee cone and the pump the follow- 
ing results were obtained :— 
V. 
In oe the precipitate to the filter (17 cub. cen- ) 
e 6’ 
aes o the frst addition of water (25 cub. cent.) to run through, : 
= ond 
Be e* third «“ «“ « 2 
= “ fourth & &“ “ 2 
2 hhh 6 ‘“ ‘“ 2 
a hh draining the precipitate --- 2 
Time required 19 
Weight of Big 2 ELS REED 0°2435 orm. 
Volume of wash-water ...-..-.--. 142 eub. centims. 
VL 
Tn etierring. the precipitate and allowing the water (18 cub. 
entims. ¥ to run throug 
Fy cap the — addition of water (25 cub. cent. ) to run through, f 
‘ ai 
| 
Pressure of phy Soe pe _0°576 meter. 
ete 3 6s 66 “ : 
“ fourth G “e « ‘ 5 
Ih draining the precipitate 1 
Time required 28 
Weight of precipitate : 0°2434 orm. — 
Volume of wash-water 118 cub. centims. 
Pressuri 0°600 meter. 
: WA, 
colt transferring the hati oc and allowing the water us ; 4! 
cub. ¢ entim s.) to ru rough 
| For the first addition of fe (25 cub. cent. ) to run through, 3, 
a 3 
. e% th a “ & “ 3 
. Tn draining the precipitate ee = | 
| : Time required ---.- ane 
‘se Z 
+ Weight of precipitate. Se 0°2432 grm. 
— of waehews! 95 cub. centims. 
