1909.] Organs of Rats and Mice, etc. 289 



Table II. 



No. 



Age. 



Eatio : 

 tumoiu'- 

 ■weight to 

 body- 

 weight. 



Digestive 

 tract. 



Liver. 



Heart. 



Kidneys. 



Lungs. 



Spleen. 





Normal Rats. — 



Ratio of 0 



rgan-weight to Body-weight less Tumour. 

















A. Usual Diet. 













o 



2—4 mos. 





- 



1 



19-7 1 



1 : 19-9 1 



1 : 180 1 



1 



94-6 1 



1 : 140-3 



J. 















B. Special Diet. 













9 



2-4 „ 







1 



30-3 



1 : 19-9 1 



1 : 205-9 



1 



122-7 



1 : 102 



1 



114-7 













1 — 2 Days after Litter. 













2 



4i „ 





- 



1 



29'8 



1 : 16-6 1 



1 : 211-8 1 



1 



109-4 



1 : 114-4 



1 



148-7 







Negative Rat (20 days after the Tumour had disappeared). 







1 



4 ,, 







1 



29-3 1 



1 : 15'6 i 



1 : 198-8 



1 



103-7 



1 : 74-8 



1 



145 











Rats with Transplanted Tumours. 





















Sarcoma. 

























A. Usual Diet. 













2 



85-5 „ 





1 : 1-6 



1 



24-7 



1 : 11 1 



1 : 134-8 



1 



62-4 



1 : 116-3 



1 



54-4 



6 



3-4i „ 





1:3-6 



1 



24-2 i 



1 : 13-2 1 



1 : 158-6 1 



1 . 



67-2 



1 : 110-6 



1 



1151 













B. Special Diet. 













7 



3-5 „ 





1:2 



1 : 



28-9 1 



1 : 12-1 1 



1 : 138 I 



1 : 



61-1 1 



1 : 99-4 



1 



101-4 















Carcinoma. 

























Usual Diet. 













3 



4-4i „ 





1 : 8-2 



1 



248 



1 : 14-0 



1 : 200-2 



1 



930 



1 : 95-8 



1 



67-6 



point, between the growth of the tumour and the weight of the liver, whether 

 comparison is made between different tumours of the same strain, tumours of 

 different strains, or spontaneous tumours. In a single case, and under 

 exceptional circumstances, an aberrant result was obtained. A mouse with 

 a tumour five months old, of strain " 37," weighed 19-5 grammes, while its 

 tumour weighed 22-5 grammes. The liver was of normal weight ; it is not 

 possible to exclude the possibility that a stage of hypertrophy had been 

 passed through. Since this case stands alone, undue weight cannot be laid 

 upon it. 



The ratio of liver to " body-weight plus tumour " corresponds in the 

 majority of cases with the normal values. Frequently, however, one finds, 

 on the one hand, as e.g. with the rat-tumours (and also Tumour " 39 "), that 

 the liver is too large in proportion to " body-weight plus tumour " ; on the 



