BODY WEIGHT ON BODY LENGTH 159 



Weight of both testes on body weight (22), (23), (24). 

 Weight of both ovaries on body weight (25), (26), (27). 

 Weight of hypophysis on body weight (28), (29). 

 Weight of both suprarenals on body weight (30), (31). 

 Weight of thyroid on body weight (32). 

 Weight of nitrogen on body weight (33). 



Second division: Formulas based on age in days 



Body weight on age (34), (35), (36), (37). 

 Weight of thymus on age (38), (39). 



Percentage of water in brain — on age (40), (41), (42), (42 a). 

 Percentage of water in spinal cord — on age (43), (44), (45), (45 a), (45 b), (45 c), 

 (45 d). 



GHOTJP II. NORWAYS 



First division: Formulas based on size 



Body length on body weight (46) . 



Body weight on body length (47), (48). 



Body weight Xorway on body weight Albino (49). 



Tail length on body length (50), (51). 



Brain weight on body weight (52). 



Cranial capacity on body weight (53). 



Spinal cord weight on body weight (54). 



Spinal cord weight on brain weight (55) . 



GROUP I. ALBINOS 



first division: formulas based ox size 



Body Lexgth ox Body Weight, (Doxaldsox, '09) 



Body length (sexes combined) = 143 log (Bd.wt. + 15) — 134 (1) 



A study of tables 1 and 2 in the investigations by Donaldson 

 '09 shows that for a given body weight the body length of the male 

 is about 2.2 per cent greater than that of the female. If then the 

 value found by this formula for any body weight is increased by 

 1.1 per cent of itself the sum obtained represents the body length 

 for the male. If on the contrary, the value found is decreased 

 by 1.1 per cent of itself, the difference obtained represents the 

 body length for the corresponding female. 



