716 



ADVENTURES IN RADIOISOTOPE RESEARCH 



Table 11. — (contd.) 



to 8.8 and 12.0 mgm/gm of sarcoma, respectively. This finding, which rela- 

 tes to two groups of sarcoma with very different sizes, supports the 

 correctness of our assumption that the percentage increase in nucleic 

 acid runs approximately in parallel with the percentage volume 

 (weight) increase. 



Table 12 



Average volume increase of 

 14 and 10 sarcomas wit- 

 hin day 



Average nucleic acid content 

 per gm of sarcoma 



Sarcomas weighing less tlian 40 gm 

 27.4% I 8.8 mgm 



Sarcomas weighing more than 40 gm 

 12.8% I 12.0 mgm 



The average specific weight of the heavy sarcomas varies between 

 1.5 and 1.9 gm with a mean of 1.8; the corresponding limits for the sarco- 

 mas weighing less than 40 gm are 1.6 and 2.5; the mean value for these 

 amounts to 2.1. 



For the sarcomas in which we are interested the increase in volume 

 and the corresponding increase in nucleic acid amount to 27 per cent 

 daily, or about 2 per cent in the course of 2 hr.^^^ The newly formed quota 



1 The above result must be interpreted with care since the volume increase 

 of the sarcoma is possibly rhythmical during the course of the day. 



