WALLACE O. FENN 385 



The adhesiveness of blood cells to solid substances is shown to be 

 a pure surface tension phenomenon, but in most reactions between 

 living cells and solid bodies the fluidity of the protoplasm is also 

 a factor of prime importance. 



The frequent occurrence of adhesiveness as a property of cells 

 in contact with solid bodies is due in part to the fact that, by so 

 adhering, the surface area of the cell not touching the solid is decreased. 



Careful criticisms of this manuscript by Dr. W. T. Bovie and Dr. 

 E. K. Carver are gratefully acknowledged. 



BIBLIOGRAPHY. 



1. Loeb, L., Am. J. Physiol., 1921, Ivi, 140. 



2. Tait, J., Quart. J. Exp. Physiol, 1918-20, xii, 1. 



3. Kite, G. L., and Wherry, W. B., /. Infect. Dis., 1915, xvi, 109. 



