Science, New Series, Vol. 72, No. 1858, Aug. 8, 1930

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Front Matter (2 pp.)
Glozel, a Mystery, pp. 127-131

David Riesman

Preparation of Scientific Articles, pp. 131-134

W. M. Davis

Obituary

Recent Deaths, pp. 134-135

Memorials, p. 135

Scientific Events

Science Service Radio Talks, pp. 135-136

Plans of the Scripps Institution for Cooperation with Eastern Agencies, p. 136

The Fourth Greenland Expedition of the University of Michigan, pp. 136-137

The International Conference of Agricultural Economists, p. 137

The British Medical Association, pp. 137-138

Scientific Notes and News, pp. 138-140

Discussion

The Relation between a Neglected Class of Facts and the Universal Law of Organic Evolution, p. 141

W. H. Longley

There is No Control, pp. 141-142

C. W. Woodworth

Black Walnut Canker, p. 142

C. R. Orton

Dutch Elm Disease in Ohio, pp. 142-143

Curtis May

The Phototropy of Ultra-Violet-Transmitting Glasses, p. 143

Lyman Chalkley

The Rate of Work Done by a Ricksha-Coolie, p. 143

Alvan L. Davis

Special Correspondence

Field Work of the National Museum of Canada, 1930, p. 144

W. H. Collins

Quotations

The Winnipeg Program of the British Medical Association, p. 145

Scientific Apparatus and Laboratory Methods

The Iowa Piano Camera, pp. 146-147

Joseph Tiffin; Carl E. Seashore

A New Mechanical Disintegrator, p. 147

E. W. Schultz; F. D. Banham

A Method of Titrating Proteolytic Enzymes, pp. 147-148

Frederick L. Gates

Special Articles

The Production of Homozygotes through Induced Parthenogenesis, pp. 148-149

E. M. East

The Production of Bacteria-Free Amoebic Abscesses in the Liver of Cats and Observations on the Amoebae in Various Media with and without Bacteria, pp. 149-151

L. R. Cleveland; Elizabeth P. Sanders

The Specific Action of a Bacterial Enzyme on Pneumococci of Type III, pp. 151-152

Oswald T. Avery; Rene Dubos

Books Received, p. 152
Science News, pp. x-xii

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