Cholesterol in Blood. 



301 



veloping a positive Wassermann reaction it has dropped to an 

 average of 22.9 per cent. These results are in close agreement with 

 the determination on the human cases. 



The balance between cholesterol and its esters is very sig- 

 nificant in both of these experiments. In no other disease so 

 far reported in the literature has such an altered relation between 

 bound and free cholesterol been observed. No conclusion as to 

 the significance of these results can be drawn as yet but it may be 

 possible that they are bound up in the question as to the nature 

 of the Wassermann reaction. 



Table II. 



Cholesterol and Cholesterol Esters in Rabbit Blood. 

 Mg. per 100 c.c. 



Rabbit 



Wassermann Reaction Negative. 



After Developing four Positive 

 Wassermann Reaction. 



Number. 



Total. 



As 



Esters. 



Total. 



As 



Esters. 



470 

 47i 

 472 

 473 

 474 

 475 

 476 



Average. 



mg. 



102 



in 

 93 

 96 

 92 



114 

 85 



mg. 

 36 

 39 

 33 

 25 

 30 

 45 

 33 



Per cent. 

 35-2 

 35-1 

 35-4 

 26.0 

 32.6 

 39-7 

 36.0 



34-3 



mg. 

 99 

 117 

 117 



98 

 93 

 90 



87 



mg. 

 24 

 15 

 19 

 27 

 26 

 21 

 27 



Per cent. 

 22.2 

 12.8 

 16.1 

 27-5 

 27.9 

 23.2 

 3IQ 

 22.9 



155 (1737) 



On the elimination of the x-chromosome from the egg of drosophila 

 melanogaster by x-rays. 



By JAMES W. MAVOR. 



[From the Department of Biology, Union College, Schenectady, N. Y.] 



The experiments to be described were performed with a view 

 to determining if x-rays by affecting the x-chromosome could 

 disturb the inheritance of a sex-linked character. Wild type 

 (red-eyed) females of Drosophila melanogaster, homozygous for 



