﻿Manchester Memoirs, Vol. xlix. (1904), No. 1. 9 



No. 1, marked "Sirdar," contained y^^th of a grain 



per lb. 

 No. 2, marked "J. O. B," contained y J-oth °f a grain 



per lb. 

 No. 3, marked " The Handy," contained ^^th of a 



grain per lb. 

 No. 4, marked " Tarlene " (which has a preparation 



applied to it), contained -^^o-th of a grain 



per lb. 



These amounts, when taken on a single sheet or on a 

 dozen sheets of cigarette paper, are quite inappreciable. 

 The results are shewn in Plate III., Fig. 1. 



Gautier, of Paris, has stated that arsenic is a con- 

 stituent of the thyroid gland. Through Dr. J. J. Cox I 

 obtained the thyroid gland of an animal, and also the 

 thymous gland. I took 5 grammes of the former and 10 

 grammes of the latter, expecting to find a much larger 

 quantity of arsenic in the thyroid gland. I found, however, 

 that weight for weight, they both contained about the 

 same quantity of arsenic, which amounted to not more 

 than the y^^th of a grain per lb. See Plate III., Fig. 1. 



One could hardly say that the trace of arsenic found 

 in either was sufficient to speak of that element as being 

 a constituent part of either gland. 



It seemed, however, interesting to determine whether 

 the same result could be obtained from the thyroid gland 

 of a human subject. I accordingly obtained the whole 

 gland, which weighed about 18 grammes. I took 15 

 grammes of it. The body from which it was taken was 

 that of a man about 65 years of age, an abstainer, who 

 died of heart disease. The thyroid gland contained only 

 a minute quantity of arsenic, y^^th of a grain per lb. 



