1896.] MICROSCOPICAL JOURNAL. 331 



The American Blood Test For Cattle Tuberculosis. 



By EPHRAIM cutter, M. D., TT. D., 



NEW YORK. 

 1. THE APPEARANCES OF BLOOD IN HEALTHY CATTLE. 



Oxford Co., Maine, is a dairy farm. The inhabitants 

 are pure English blood, indeed purer English than those 

 living in Great Britain. 



Intelligent care watches over the kine of Oxford Co., 

 Me. Hence this locality was selected as giving the best 

 standard of kine fed on natural, not artificially prepared 

 foods, living in pastures well watered, with good herb- 

 age. The following notes are submitted, of examinations 

 of blood supposed healthy. 



SERIES I. 



Buckfield, Me., kine of Mr. Conant, 189-5, July 31. 

 Assistance of Dr. J. F. De Costa, now of Rumford Falls, 

 Me., and Mr. Conant. 



1 Stall fed bull, (a) Crenated red corpuscles, (b) 

 Serum in excess, (c) Crystals of the triple phosphate of 

 ammonia, magnesia and soda, (d) No signs of tubercu- 

 losis. 



a and h were due to the mode of collecting the blood, 

 punctures not quite deep enough. The extraordinary 

 thick fibrous structure of the bull's skin, with a puncture 

 entirely sufficient for the average human being, merely 

 allowed the serum to filter through with a moiety of the 

 red and white corpuscles. It is possible that kiue have 

 more sensitive skins than most are aware of, as I have 

 noticed that some kine cringe when approached by un- 

 known persons. In these studies I have sought to modify 

 this bovine fear by having those herdsman, present whom 

 the cattle know. 



2 One year old Jersey bull, grass fed. Healthy blood. 



3 Cow common breed. Two samples examined. Mor- 



