Proceedings of the National Academy of Sciences of the United States of America, Volume 7

Front Cover
National Academy of Sciences, 1921
The Proceedings of the National Academy of Sciences (PNAS) publishes research reports, commentaries, reviews, colloquium papers, and actions of the Academy. PNAS is a multidisciplinary journal that covers the biological, physical, and social sciences.

From inside the book


Other editions - View all

Common terms and phrases

Popular passages

Page 137 - Papers from the Department of Biometry and Vital Statistics, School of Hygiene and Public Health, Johns Hopkins University, No. 4. 2 Pearl, R.,
Page 357 - Science and the Division of Chemistry and Chemical Technology of the National Research Council.
Page 322 - PROCEEDINGS is the official organ of the NATIONAL ACADEMY OF SCIENCES and of the NATIONAL RESEARCH COUNCIL for the publication of brief accounts of important current researches of members of the ACADEMY and of the COUNCIL and of other American investigators, and for reports on the meetings and other activities of the ACADEMY and of the COUNCIL.
Page 340 - Crustacea. AS PACKARD. Read April 21, 1885. Plate opposite page 137, and Plate 4. Pp. 135-139. 16. On the Carboniferous Xiphosurous fauna of North America. AS PACKARD. Read November 13, 1885. Plate opposite page 150, and Plates 5-7. Pp. 141-157. 17. On two new forms of Polyodont and Gonorhynchid fishes from the Eocene of the Rocky Mountains. ED COPE.
Page 360 - Number 2. Research laboratories in industrial establishments of the United States of America. Compiled by Alfred D. Flinn. March, 1920. Pages 85. Price $1.00. [Out of print. See Number 16.] Number 3. Periodical bibliographies and abstracts for the scientific and technological journals of the world.
Page 141 - TALIAFERRO 141 value by the 25th day. At first it looks as if the mean tends to rise even until the 32nd day. That this is not the case, however, is shown by the fact that the value on the 25th day does not vary appreciably from that of the 72nd day. The same type of result was obtained for all of the six distances shown in figure 1, namely, for the distances posterior end to parabasal body, parabasal body to nucleus, nucleus to anterior end, anterior end to end of T Lenath FIG.
Page 326 - K is a, the degree of the subgroup composed of all the substitutions of G which omit a given letter being n a.
Page 339 - On a method of precisely measuring the vibratory periods of tuning-forks, and the determination of the laws of the vibrations of forks; with special reference to these facts and laws to the action of a simple chronoscope.
Page 66 - The volume of many metals at 0 C. and 12,000 kg. [per cm.2] is less than the volume at atmospheric pressure at 0 Abs. The resistance of most metals tends towards zero at 0 Abs., but at 0 C. at the same volume the resistance is only a few per cent less than under normal conditions.
Page 359 - Report of research under the joint auspices of the US Bureau of Mines and the National Research Council. By SP HOWELL.

Bibliographic information