Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1921 |
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Page 217
... early de- veloped in Germany , forced that country to substitute for cotton chemically - prepared wood fiber . A wider range of raw materials is available for the production of high explosives , in which are utilized toluol , phenol ...
... early de- veloped in Germany , forced that country to substitute for cotton chemically - prepared wood fiber . A wider range of raw materials is available for the production of high explosives , in which are utilized toluol , phenol ...
Page 288
... early winter are protective adapta- tions of vital necessity to the native trees and shrubs . A little consideration will show how important the principle of chilling is to those species of trees and shrubs which are subjected each year ...
... early winter are protective adapta- tions of vital necessity to the native trees and shrubs . A little consideration will show how important the principle of chilling is to those species of trees and shrubs which are subjected each year ...
Page 412
... early ravages of typhus in the Balkans ; we know of the loss through other insect- borne diseases in the eastern expeditions ; and it is most interesting to realize that , although the need for the services of trained entomol- ogists ...
... early ravages of typhus in the Balkans ; we know of the loss through other insect- borne diseases in the eastern expeditions ; and it is most interesting to realize that , although the need for the services of trained entomol- ogists ...
Contents
Bureau of American Ethnology | 17 |
Report on the United States National Museum | 25 |
EXECUTIVE COMMITTEE AND REGENTS | 100 |
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acromegaly actinium agriculture airplane American appears areas astrographic atom birds blueberry body Bohemia Bureau Calama cent chilling cicada collection color crops culture dormant early eclipse eggs elephants entomologists expedition feet field forest gases geographic geological survey glands glass Government growth Guatemala helium important increase Indians insects interest investigations irrigation J. J. Thomson June 30 land mammoth Manchuria material ment method milpa National Museum natural nebulae Observatory observed obtained opal oxide park period photographs plants plates present production publications pupa radiation radium Ramsay Rathbun recent reclamation region right ascension River scientific Secretary shown Smithsonian Institution Smithsonian Report Sobral solar solar constant South species specimens spiral nebulae spirals stars supply temperature tion trees tropical tube United vacuum tube Valley vitreous volumes Washington wireless telephone