Manchester Memoirs, Vol. Ixii. (191 7), No. 5 5 



A third experiment was made by comparing both of these foods 

 with "Plasmon" which is dried casein, as one of the constituents of 

 the ration, in place of lean beef or Somatose. I found that 0.487 

 gramme of Plasmon contained the same amount of Nitrogen as 

 2 grammes of lean beef or 0.416 gramme of Somatose, and I there- 

 fore weighed out this quantity, but as this left less dry total solid 

 matter than that contained in lean beef, I made up the difference 

 by adding 0. 15 gramme of Glucose. 



2 grammes of water were mixed with the oats and lean meat, 

 this together with the water contained in the lean beef itself was 

 equivalent to 3.36 grammes of water in the lean beef ration, and 

 this quantity of water was added to the dry ration which contained 

 Somatose, and which contained Plasmon. 



Two mice were fed on each of these rations, accurately 

 weighed out, to each mouse every 24 hours, and each mouse 

 was carefully weighed after that time. Some difficulty was found 

 in weighing the mice, as they would not remain still on the pan of 

 the balance ; this was overcome by putting each mouse into a small 

 wide mouthed bottle, with a cover of wire gauze to keep it in 

 and weighing the mouse plus the tared bottle and cover. 



The weight of each of the six mice was calculated in terms of its 

 original weight, which was taken as 100 parts, and the following 

 graph Fig. 1 shews the changes in weight during each day of 24 

 hours. 



The following were the dailv rations for each mouse, numbered 

 1 to 6. 



MICE. 



Nos. 1 and 2 Nos. 3 and 4 Nos. 5 and 6 

 Oats 2.000 2.000 2.000 



*Lean meat chopped 



fine 









and mixed with 



the 









oats 





2.000 







*Dry Somatose ... 







.416 





*Dry Plasmon 









.487 



Dry Glucose 







.224 



.150 



Water 





2.000 



3.360 



3.363 





6.000 



6.000 



6.000 



*The weights of each of these rations contained 0.063 gramme of 

 Nitrogen in addition to the Nitrogen present in the oats. The 

 same amount of dry solid matter and the same amount of water 

 was also contained in each. 



