SEX RATIOS IN FCETAL CATTLE. 2/1 



6. Discrepancies between the primary and secondary sex 

 ratios in cattle, excepting errors of sampling, are due to sex 

 eliminating factors rather than factors that effect the primary 

 sex ratio. 



LITERATURE CITED. 

 Babcock and Clausen 



'18 Genetics in Relation to Agriculture. New York. 

 Guyer, M. F. 



'09 On the Sex of Hybrid Birds. BIOL. BULL., Vol. XVI. 

 King, H. D., and Stotensburg, J. M. 



'15 On the Normal Sex Ratio and the Size of the Litter in the Albino Rat. 



Anat. Record, IX. 

 Newcomb, S. 



'04 The Probability of Causes of the Production of Sex in the Human Offspring. 



Carnegie Inst. Wash. Pub. n. 

 Parker, G. H., and Bullard, C. 



'13 On the Size of Litters and the Number of Nipples in Swine. Proc. Am. 



Acad. Arts and Sciences, Vol. 49. 

 Pearl, R., and Parshley, H. M. 



'13 Data on Sex Determination in Cattle. BIOL. BULL., Vol. 24, No. 4. 

 Pearl, M., and Pearl, R. 



'08 On the Relation of Race Crossing to the Sex Ratio. BCOL. BULL., Vol. 15. 

 Pearl, R. 



'17 The Control of the Sex Ratio. Maine Agricultural Experiment Station 



Bulletin, No. 261, Part 3. 

 Schultz, A. M. 



'18 Studies in the Sex Ratio in Man. BIOL. BULL., Vol. 34, No. 4. 

 Wentworth, E. N. 



'14 Sex in Multiple Births. Science, N.S., 39. 

 Wilckens, M. 



'87 Untersuchungen tiber das Geschlechtsverhaltnis und die Ursachen der 



Geschlechtsbildung bei Haustieren. Biol. Centralbl., Bd. VI. 

 Wodsedalek, J. E. 



'20 Studies on the Cells of Cattle with Special Reference to Spermatogenesis 

 Oogonia and Sex-determination. BIOL. BULL., Vol. XXXVIII., No. 5. 



