CHANGES IN COMPOSITION OF BODY OF RAT 



33 



TABLE 7 



Showing the data on the growth of protein, fat and ash in various mammals, asso- 

 ciated with the growth in body weight, as well as the changes in the water content 

 of the body 



Man 



Rabbit 



Rat 



Man 



Rabbit 



Dog 



Cat 



Pig 



Rat 



Man 



Dog 



Cat 



Rat 



Man 



Rabbit 



Dog 



Rat 



Dog 



Cat 



Guinea-pig. . 

 Rat 



5| months fetus 

 21 'days fetus 

 Birth 



7 months 



premature birth 

 Birth 

 2 days 

 4 days 

 Birth 

 7 days 



New born 

 44 days 



14 days 



15 days 



28 days 

 Grown 

 52 days 

 32 days 



49 days 

 83 days 

 Grown 

 294 days 



BODY 

 WEIGHT 



grams 



508.0 



11.7 



4.3 



116,9 



38.4 



267.0 



152.9 



1,726.0 



10.2 



3,058.0 



1,460.0 



515.0 



13.5 



3,838.0 



1,480.0 



2,011.0 



47.6 



1,985.0 



1,389.0 



424.0 



277.5 



WATER SOLIDS 



86.9 

 86.3 



87.2 



81.8 



79.4 

 80.5 

 80.0 

 80.0 

 79.8 

 80.3 



72.7 

 72.8 

 73.8 

 72.9 

 73.1 



69.7 

 69.2 

 70.1 

 70.1 

 69.8 



64.6 

 66.7 

 67.1 

 65.3 

 66.2 



13.1 

 13.7 

 12.8 

 13.2 



18.2 



20.6 

 19.5 

 20.0 

 20.0 

 20.2 



19.7 



27.3 

 27.2 

 26.2 

 27.1 

 26.9 



30.3 

 30.0 

 29.9 

 29.9 

 30.2 



35.3 

 33.3 

 32.9 

 34.7 

 33.8 



PRO- 

 TEIN 



8.1 

 8.5 

 8/7 

 8.4 



10.4 



11.5 

 13.2 

 13.6 

 13.4 

 10.1 



12.1 



11.8 

 14.5 

 15.0 

 13.1 

 13.6 



13.9 

 18.2 

 13.6 

 15.7 

 15.4 



13.4 

 20.1 

 19.9 

 22.1 

 18,9 



1.3 

 2.1 

 2J 

 2.0 



3.2 



4.9 

 1.9 

 2.7 

 1.4 

 8.0 



3.7 



10.7 

 10.3 

 7.1 

 11.8 

 10^0 



13.1 

 7.8 

 12.1 

 11.1 

 11.0 



18.9 

 7.9 



10.0 

 9.0 



11.5 



2.4 

 1.4 

 1^ 



1.8 



2.9 



2.5 

 2.3 

 2.4 

 1.8 

 2.0 



2,3 



2.6 

 2.7 

 2.5 

 2.2 

 2.5 



3.1 

 5.8 

 2.9 

 3^ 

 3.8 



2.8 

 3.3 

 4.4 

 3/7 

 3.6 



geneous as to the method of analysis, as well as to the condition 

 and number of animals, and all of these facts should be con- 

 sidered when interpreting the data. 



The data are arranged in five groups. In group 1 the animals' 

 whose bodies give the percentage of water which is nearly the- 



THE AMERICAN JOURNAL OF ANATOMY, VOL. 21, NO. 1 



