Proceedings of the National Academy of Sciences of the United States of America, 7. sējumsNational 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. |
No grāmatas satura
1.–5. rezultāts no 71.
1. lappuse
... Communicated by G. E. Hale , November 10 , 1920 One of the most interesting questions in astronomy concerns the rela- tion of the spiral nebulae to the galactic system . Are they or are they not separate stellar systems comparable with ...
... Communicated by G. E. Hale , November 10 , 1920 One of the most interesting questions in astronomy concerns the rela- tion of the spiral nebulae to the galactic system . Are they or are they not separate stellar systems comparable with ...
5. lappuse
... Communicated by R. A. Millikan , December 4 , 1920 It is well known that the process of ionization in gases consists of the detachment of an electron from the molecules or atoms ionized . It has further been proved that in air at ...
... Communicated by R. A. Millikan , December 4 , 1920 It is well known that the process of ionization in gases consists of the detachment of an electron from the molecules or atoms ionized . It has further been proved that in air at ...
18. lappuse
... Communicated by H. F. Osborn , December 2 , 1920 The chronological outline herein presented is the result of ten years ' research among prehistoric aboriginal remains in that portion of the San Juan watershed lying in northwestern New ...
... Communicated by H. F. Osborn , December 2 , 1920 The chronological outline herein presented is the result of ten years ' research among prehistoric aboriginal remains in that portion of the San Juan watershed lying in northwestern New ...
23. lappuse
... Communicated by A. O. Leuschner . Read before the Academy , November 16 , 1920 For a number of years geodetic data were collected for the purpose of controlling surveys and maps and for the determination of the shape and size of the ...
... Communicated by A. O. Leuschner . Read before the Academy , November 16 , 1920 For a number of years geodetic data were collected for the purpose of controlling surveys and maps and for the determination of the shape and size of the ...
28. lappuse
... Communicated by O. Veblen . Read before the Academy , November 17 , 1920 In studies which were described some time since1 it was found that hydrogen , when discharged electrolytically upon any one of certain metals which occlude it ...
... Communicated by O. Veblen . Read before the Academy , November 17 , 1920 In studies which were described some time since1 it was found that hydrogen , when discharged electrolytically upon any one of certain metals which occlude it ...
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Citi izdevumi - Skatīt visu
Bieži izmantoti vārdi un frāzes
Academy of Sciences acid Amer average bundles character Chem chromosome coefficient of variation column constant corresponding crossing curves determined deviation diameter differential Diminished Distributed free E. H. MOORE Easton ebullioscopy EDWIN BIDWELL WILSON electrons energy equation error experiments factor figure flour frequency fringes function GANO DUNN genetic given Globe heat Home Secretary hypocotyl infection Institution integral interferometer investigations ionization loci mean measurements melanogaster mercury metal method molecules mutant National Academy NATIONAL RESEARCH COUNCIL non-disjunction normal observed obtained orbits paper phosphorescent physical pink plate portrait postage 1 cent prediction pressure PROCEEDINGS publications pure line Quercina ratio RAYMOND PEARL Read April region Reprinted seedlings sextic shown Single numbers solution temperature theorem tion transformation trypanosomes tube values variable velocity VERNON KELLOGG volume Washington wave-length zero
Populāri fragmenti
137. lappuse - Papers from the Department of Biometry and Vital Statistics, School of Hygiene and Public Health, Johns Hopkins University, No.
360. lappuse - Washington, DC The Bulletin of the National Research Council presents contributions from the National Research Council, other than proceedings, for which hitherto no appropriate agencies of publication have existed. The "Bulletin" is published at irregular intervals.
358. lappuse - Science and the Division of Chemistry and Chemical Technology of the National Research Council.
44. lappuse - THE PROCEEDINGS is the official organ of the NATIONAL ACADEMY OF SCIENCES and of the NATIONAL RESEARCH COUNCIL for...
141. lappuse - ... 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 Lencjth PIG.
361. lappuse - Number 12. Cooperative experiments upon the protein requirements for the growth of cattle. First report of the Subcommittee on Protein Metabolism in Animal Feeding. By HENRY PRENTISS ARMSBY, Chairman. June, 1921. Pages 70. Price $1.00. Number 13. The research activities of departments of the state government of California in relation to the movement for reorganization. By JAMES R. DOUGLAS. June, 1921. Pages 46. Price 60 cents.
339. lappuse - 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.
66. lappuse - 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.
41. lappuse - As a matter of record it seems advisable to bring up to date and summarize the chief results derived from the writer's main pedigree culture of Paramecium aurelia. This culture, designated Culture I, was started on May 1, 1907, by the isolation of a "wild" individual which was found in a laboratory aquarium.1 The original specimen was placed in about five drops of culture fluid on a glass slide having a central ground concavity, and when this animal had produced four individuals, each of these was...
44. lappuse - However, at the formal termination of the experiments in 1915, I was reluctant to discard the race and was tempted to keep it under control but without such exacting daily observation and recording of the daily division rate. In this manner it has been maintained up to the present (December, 1920). But, from time to time, thirty-day tests have been made of the vitality of the race under the former rigid culture conditions, and in each case the same general average division rate has been revealed...