570 



ANNUAL REPORT OF THE 



Off. Doe. 



Microscopic examination of these samples shows the presence of 

 no very marked quantity of foreign substances except in case of 

 No. 250. This sample, while it shows the presence of the character- 

 istic tissues of the flax-seed, contains a very large proportion of dark- 

 brown hulls, containing loug woody fibers, and of clear white masses 

 not found in flax-seed but like those of buckwheat bran; also, there 

 is a noticoa1)le f|uantity of chaff. The very low proportion of nitrogen 

 in this sample is such as Ihe subslitutinn of most of fhc linsocd m(\al 

 by buckwheat bran would render probab1(>. 



