46 
Pure and Mixed Linseed-Cakes. 
presented by many of the oats. On tlie left side of this drawing 
is represented the greyish deposit in great quantity. It there 
appears to be convoluted or folded. On making longitudinal 
sections of some of these oats, the white farinaceous matter con- 
tained in oats of good quality was sometimes partially, and 
sometimes completely, replaced by a dark-coloured, hard, horny 
mass. C, Fig. 36, represents a vertical section of an oat of this 
description, in which the horn-like body has been partially 
developed. A, Fig. 3G, is a section of a healthy oat, and is placed 
by the side of C for the sake of comparison. 
Fig. 37. — Ai->pearance of tlic Pulccrulcnt Bcpoi^it on the Shin of iJie Oa!s 
under a quarter-inch ohject-glass. 
Microscopic Examination of the Grey Pulverulent Deposit and. of 
the Horny Mass. 
When microscopically examined by a quarter-inch object- 
glass, the grey pulverulent deposit upon the exterior of the oats, 
as well as the horny mass contained in tbem, presented the 
appearance indicated in Fig. 37. 
These small circular bodies are the spores or germs of minute 
