Pure and Mixed Linseed-Cakes. 
45 
projected some distance above the surface of the oat. Under the 
microscope the thready material was found to consist of elongated 
cells, and the surface of the oats was covered more or less with 
well-defined bodies, which were also observed, but in few 
numbers, to be connected with the thready material ; the dark 
grey matter found in the interior of the oat was granular, the 
granules being supported by a reticular-like substance. 
The investigation was further carried out by Professor Tuson, 
who has placed his report at my disposal, and 1 have not only to 
thank him for it, but also the Editors of the ' Veterinarian ' for 
Fig. 3G. — Comparative Bepresentations of healthy and moulJij Oats. 
liberally lending me the blocks to reproduce in the Society's 
Journal the beautiful microscopic objects, a description of which 
I am permitted to give in Professor Tuson's own words. 
General Characters of the Oats. 
When examined by the naked eye they were found to be 
coated more or less completely by a greyish pulverulent matter, 
which could be easily detached, and by minute specks, having a 
drab colour, and sometimes a silvery-white appearance. 
By referring to B, Fig. 36, one can observe the appearance 
