ON THE PHYSICS OF CLOUDS AND PRECIPITATION 181 
. Vormer, M., Kinetik der Phasenbildung. Leipzig, T. Stein- 
kopff, 1939. 
3. VonnecutT, B., “Nucleation of Supercooled Water Clouds 
by Silver Iodide Smokes.” Chem. Rev., 44: 277-289 (1949). 
. Wecener, A., Thermodynamik der Atmosphdre. Leipzig, J. 
A. Barth, 1911. 
. WEIcKMANN, H., “‘Die Hisphase in der Atmosphire.”’ Ber. 
dtsch. Wetterd. U. S.-Zone, Nr. 6, 54 SS. (1949). 
56. Wreanp, A., “Uber die Natur der Kondensationskerne in 
der Atmosphare insbesondere tiber die Kernwirkung von 
Staub und Rauch.” Meteor. Z., 30: 10-18 (1913). 
57. Woopcock, A. H., and Grrrorp, Mary M., “Sampling At- 
mospherie Sea-Salt Nuclei over the Ocean.” J. mar. Res., 
8: 177-197 (1949). 
58. Wricut, H. L., “Atmospheric Opacity at Valentia.” Quart. 
J. k. meteor. Soc., 66: 66-77 (1940). , 
