igii] 



Carl L. Aisberg 



97 



Page 



I20 



Il6 



tion of calcium in the presence 

 of Phosphates and magnesium . 



F. Alex. McDermott. The sta- 

 bility of the photogenic material 

 of the lampyridae and its prob- 

 able chemical nature 



W. J. V. OsTERHouT. The absorp- 

 tion of inorganic salts by living 

 protoplasm 13' 



M. E. Pennington and J. S. Hep- 

 BURN. The occurrence of lipase 

 in the fat of the common fowl — 

 Gallus domesticus 127 



Frank Rabak. The effect of frost 

 on the aromatic constituents of 

 the peppermint plant 98 



Howard S. Reed. The effect of 

 the club root disease upon the 

 ash constitutents of the cabbage 

 root 



A. R. Rose. A cage designed for 

 metabolism experiments on goats 



R. E. Rose and Carl Livingston. 

 The leaf-oil of the Washington 

 cedar (Thuja plicata) 132 



Jacob Rosenbloom. On the lipins 

 of the heart muscle of the ox . . 114 



Jacob Rosenbloom. The effect of 



97 

 "3 



Pagb 



pregnancy on the lipins of the 

 ovary and corpus luteum of the 

 cow 115 



Edmund C. Shorey. Nucleic 

 acids in soils 104 



M. X. Sullivan. Creatinine in 

 plants and in the medium in 

 which they grow 100 



R. H. True and H. H. Bartlett. 

 Absorption and excretion of salts 

 by roots, as influenced by con- 

 centration and composition of 

 culture Solutions. I. Concentra- 

 tion relations of dilute Solutions 

 of calcium and magnesium ni- 

 trates to pea roots 99 



L. L. Van Slyke and Alfred W. 

 BoswoRTH. The brine-soluble 

 Compound found in cheese 117 



J. A. Wesener and George L. 

 Teller. Aging of flour and its 

 effect on digestion 126 



R. H. Williams and A. D. Em- 

 METT. Effect of the quantity of 

 protein ingested on the nutrition 

 of animals. III. On the ash and 

 total phosphorus from lambs .. i" 



The Effect of the Club Root Disease upon the Ash Con- 

 stituents of the Cabbage Root 



HOWARD S. REED 



(Laborafory of Plant Pathology, Virginia 'Agriculttiral Experi- 

 ment Station, Blacksburg, Va.) 



Ash analysis of healthy and diseased cabbage roots reveals ap- 

 preciable variations in the amounts of certain constituents while 

 others vary but slightly. In the diseased roots there was an appre- 

 ciable increase in the amounts of calcium, magnesium, phosphoric 

 acid, potassium and sulphuric acid, i. e., an increase in the amount 

 of " essential " Clements. 



The greatest increase of any single constituent was in the case of 

 potassium. The increase of potassium appears to be coupled with 

 an increase of protoplasmic substance and accumulation of starch. 



The Proportion of calcium to magnesium is greater in the 

 diseased roots. The same is also true of the proportion of potas- 

 sium to sodium, but there is no material difference in the proportion 



