1905 - 6 .] Excretion of Allantovm in Thymus Feeding . 105 
nitrogen, per 100 grin, of organ, or 5’2 and 11 ’6 per cent, of total 
nitrogen. 
5. The evidence seems to indicate that the administration of raw 
thymus, and to a less extent of raw pancreas, exercises some 
specific action on the production of allantoin. 
To Dr Noel Paton, Superintendent of the Research Laboratory of 
the Royal College of Physicians, I am indebted for much advice 
and assistance during the progress of the research, and in the 
preparation of this paper. 
The expenses of this research were defrayed from Mr Francis- 
Mason’s donation to the Laboratory for the Investigation of 
the Ductless Glands. 
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