158] 



Analysis of Grass and Hay 



105 



in grass be estimated as soon as possible after the sample has 

 been taken, otherwise much will be lost by evaporation. It is 

 best to weigh out all the portions required for different parts 

 of the analysis immediately after the grass or hay has been 

 cut up. The following portions should be weighed out : 



20 grams of hay, or 

 50 „ grass 

 5 grams of hay, or I for 



10 „ grass J 



10 grams of hay, or 

 40 „ grass 



\ for moisture ; 



for crude fibre. 



These substances are somewhat too bulky to weigh out on 

 a delicate balance ; therefore a large balance, such as is repre- 



Fig. 4 



sented in fig. 41, is used. It must be capable of discerning 

 •005 gram. 



The moisture portion is weighed out in a sheet of filter 

 paper which has been folded to form a sort of bag for holding 

 the grass. Instead of weighing the filter paper to begin with, 

 it should be counterpoised by placing a similar piece in the 

 other scale pan, and cutting off bits of the heavier one until 

 both pieces are of the same weight. Both pieces of paper 



