R. Bunsen on the Washing of Precipitates. 335 
tion of 40 cub. centims. only is necessary. Now by employing 
the best form of water-bath, i. e., one possessing a constant 
water-level, such as is used in my laboratory, it is possible, 
| under favorable circumstances, to evaporate in a porcelain dish 
. lcub. centim. of water in 27 seconds. © onsequently the evapo- 
ee 
eable in sepa- 
mother-li 
* 
