﻿Prof. R. Bunsen on the Washing of Precipitates. 11 



VI. 



In transferring the precipitate and allowing the water (18 1 ' 



cub. centims.) to run through J 



For the first addition of water (25 cub. cent.) to run through. 4 



„ second „ „ „ „ 5 



„ third „ „ „ „ 5 



„ fourth ■„ „ „ „ 5 



In draining the precipitate 1 



Time required . 28 



Weight of precipitate .... 0*2434 grm. 

 Volume of wash-water .... 118 cub. centims. 

 Pressure 0*600 metre. 



VII. 



In transferring the precipitate and allowing the water (20 1 J 



cub. centims.) to run through . J 



For the first addition of water (25 cub. cent.) to run through. 3 



„ second „ „ „ „ 3 



„ third „ „ „ „ 3 



In draining the precipitate 3 



Time required 16 



Weight of precipitate .... 0*2432 grm. 

 Volume of wash-water .... 95 cub. centims. 

 Pressure 0*584 metre. 



VIII. , 



In transferring with 25 cub. centims. of water. 8 



For the first addition of 25 cub. centims. 1 - 



to run through J 



For the second addition of 25 cub. centims. \ * 



to run through . J 



In draining the precipitate 3 



Time required 21 



Weight of precipitate . . . 0*2435 grm. 

 Volume of wash-water . . 72 cub. centims. 

 Pressure ....... 0*593 metre. 



IX. 



In transferring with 15 cub. centims. of water"! ' 



and allowing it to run through . . . j 

 For a single addition to run through ... 3 

 In draining the precipitate 2 



Time required 12 



Weight of precipitate . . . 0*2439 grm. 

 Volume of wash-water . . 41 cub. centims. 

 Pressure 0*572 metre. 



