iv TABLE OF CONTENTS 
Operation and Resultsiot Broject Pluviusyeses eee ee Tor Bergeron 
FUNDAMENTAL PRECIPITATION PROCESSES 
Hthqencysor Naturaleaine serie eer eee ee Raymond Wexler 
The Aerosol Spectrometer and Its Application to Nuclear Condensation Studies 
A. Goetz and O. Preining 
Differences in Coalescence Tendencies in Computed Condensation Cloud 
Droplet SPectralecs caer: = erie cea tee reece een ee W. A. Mordy 
Computations of the Growth of Cloud Drops by Condensation Using an Elec- 
tronic Disitali Computer. sy eee M. Neiburger and C. W. Chien 
The Relation between Cloud Droplet Spectra and the Spectrum of Cloud 
INUUGLELSG siesta neew et heen owe Per peek ere P. Squires and S. Twomey 
A Statistical Study of Cloud Droplet Growth by Condensation... .Claes Rooth 
The Nucleation and Growth of Ice Crystals................... B. J. Mason 
The Influence of Climate and Weather Elements on the Activity of Natural 
reezinpsNucleiyay ss tages ee cind sar aeeee Hans-Walter Georgii 
Recent Observations of Freezing Nuclei Variations at Ground Level 
Dwight B. Kline 
Studies on the Effect of Chemisorbed Impurities on Heterogeneous Nuclea- 
TKO LO eM et ae neti ce neers nem eee Cac ee ea eM ano ge eas eye Seymour J. Birstein 
Some Observations of Chloride-Sulfate Relationships in the Atmosphere and 
INsPrecipltatione yy wet er ee mere tye ee ee James P. Lodge 
Preliminary Results on the Aggregation of Ice Crystals 
R. E. Hallgren and C. L. Hosler 
Growth by, Accretion inithedice bhasemer ce. tse eee R. H. Douglas 
Frequency Distributions of Precipitation................ Oskar Essenwanger 
Some Aspects of the Optics of the Rainbow and the Physics of Rain 
Friedrich E. Volz 
A Possible Effect of Lightning Discharge on Precipitation Formation Process 
Bernard Vonnegut and Charles B. Moore 
Estimates of Raindrop Collection Efficiencies in Electrified Clouds 
C. B. Moore and B. Vonnegut 
Hart FORMATION 
Dhe Mechanismyot Hal) Formatione.-. cee heer rae Raymund Singer 
Design and Operation of the Swiss Hail Tunnel.................Roland List 
Growth and Structure of Graupel and Hailstones............... Roland List 
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