Rye and Derwent Drainage. 



129 



vessels become inflamed, and lymph is deposited. This, how- 

 ever, being of an unhealthy nature, soon runs on to softening, 

 which extends to the skin overlying the part, and ulcerating 

 farcy-buds are formed. On the surface of the more vascular 

 mucous membranes effusions of tubercular matter are also poured 

 out; these take on an unhealthy inflammation, and degenerate 

 into chancrous ulcers, which may generally be seen on the mucous 

 membrane of the nostrils in most bad cases of glanders. 



These are the most common scrofulous diseases of horses ; 

 but an animal of the scrofulous diathesis, besides being specially 

 subject to these, is little able to withstand ordinary morbific 

 causes, and hence is also unusually liable to many ordinary dis- 

 eases ; in such a subject, too, disease is very apt to be severe 

 and complicated, and to be acted on tardily and imperfectly by 

 all remedies. 



\Papers hy the same author^ on the hereditary diseases of cattle and pigs, will appear 

 in future numbers of the Journal.'] 



IX. — Report upon ilie Rye and Derwent Drainage. 

 By John Henderson. 

 To Mr. Pusey, 



Sir, — It affords me great pleasure to comply with your request 

 to furnish the readers of the Society's Journal with a report upon 

 the proceedings of the Commissioners of the Rye and Derwent 

 Drainage. 



Natural causes during the present unusually wet season seem 

 to give additional weight to the deductions of scientific agricul- 

 ture, in urging the attention of the public to the subject of Dis- 

 trict Drainage^ at a time when our valleys are converted into lakes, 

 our drains choked up, and the land so injuriously saturated with 

 moisture that it is impossible to exaggerate the importance of the 

 subject, or calculate the enormous damage which has been done 

 by a few weeks of very rainy weather. 



It is admitted by all that the first principle of agriculture is 

 the thorough drainage of the land, and the first requisite of 



consisting chiefly in a diminution of the red corpuscules, and a proportional in- 

 crease of the fibrine and albumen : — 



Blood of Healthy Horse. Blood of Glanderous Horse. 



A. B. 



Water 804*75 842- 859- 



Fibrine 2-41 6*60 8-7 



Blood corpuscules . , 117-13 68-20 44*20 



^'a* 1-31) ....^ r.^,^^ 



Albumen .... 67-85i 



Soluble salts ... 6 '82 6 '50 5 '38 



Simon's Animal Chemistry, by Dr. Day, vol. i. pp. 346-7. 

 VOL. XIV. K 



