PROCEEDINGS OF THE CHEMICAL DEPARTMENT. 



499 



The second sample, in which there were 6'32 

 impurities, contained — 



per 



cent, of 



A comparison of the foregoing analyses shows that considerable 

 variations exist in the composition of the different samples of 

 linseed, though they do not point to any very decided connection 

 between that and the locality in which they were grown. The 

 oil differs less perhaps than any other constituent, varying from 

 about 35 per cent, up to 40. In general, the samples from 

 warm climates appear to contain the largest quantity, but it can 

 scarcely be said that the difference is such as to enable us to 

 say that this is to be considered as a general rule. The albu- 

 minous compounds vary more widely, ranging from 16 6 up to 

 24, and their proportion appears to depend very greatly upon 

 the full development of the seed. In all cases the samples com- 

 posed of the heaviest seeds are richest in albuminous compounds, 

 and there can be little doubt that in these cases the linseed is 

 also most matured, and probably has been cultivated in a careful 

 and liberal manner. Considerable difference exists also in the 



