106 AGRICULTURAL EXPERIMENT STATION. [Jan. 



the material, having been nearly or completely freed from 

 tal. are boiled for thirty minutes with 200 cubic centimetres 

 of \\ per cent, sulphuric acid, brought upon a linen filter 

 and thoroughly washed with boiling water. It is then 

 washed into the boiling-flask with a li per cent, solution of 

 sodium hydrate, brought quickly to 100° C, and boiled for 

 thirty minutes, when it is filtered through a Gooch crucible, 

 or balanced filter-papers, washed with boiling water, alcohol 

 and ether, dried at 100° C for an hour, and weighed. The 

 organic matter is then burned off, and the weight of the ash 

 deducted for crude cellulose. 



