Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1911 |
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Сторінка
... solar constant of radiation , by C. G. Abbot .. Astronomical problems of the southern hemisphere , by Heber D. Curtis .. The progressive disclosure of the entire atmosphere of the sun , by Dr. H. Deslandres ..... Recent progress in ...
... solar constant of radiation , by C. G. Abbot .. Astronomical problems of the southern hemisphere , by Heber D. Curtis .. The progressive disclosure of the entire atmosphere of the sun , by Dr. H. Deslandres ..... Recent progress in ...
Сторінка 37
... solar - constant " observations obtained by Mr. Abbot at the Smithsonian Mount Whitney station in California at an ... solar constant . " In 1905 this " constant , " according to various authorities , was stated at values ranging between ...
... solar - constant " observations obtained by Mr. Abbot at the Smithsonian Mount Whitney station in California at an ... solar constant . " In 1905 this " constant , " according to various authorities , was stated at values ranging between ...
Сторінка 73
... solar constant of radiation . When in 1902 the first attempts were made here to measure it , that first - rank constant of nature , the intensity of the solar radiation at the earth's mean distance from the sun , was unknown within the ...
... solar constant of radiation . When in 1902 the first attempts were made here to measure it , that first - rank constant of nature , the intensity of the solar radiation at the earth's mean distance from the sun , was unknown within the ...
Сторінка 74
... solar constant itself . There were at that time two principal and seemingly formidable difficulties hindering the determination of the solar constant of radiation . First , there was no instrument capable of absorbing fully and adapted ...
... solar constant itself . There were at that time two principal and seemingly formidable difficulties hindering the determination of the solar constant of radiation . First , there was no instrument capable of absorbing fully and adapted ...
Сторінка 75
... solar constant measurements . A prism of quartz and two mirrors of magnalium were the only optical parts to affect the rays , so that it was possible to observe from wave length 0.29 μ to wave length 3.0 μ . This extended region ...
... solar constant measurements . A prism of quartz and two mirrors of magnalium were the only optical parts to affect the rays , so that it was possible to observe from wave length 0.29 μ to wave length 3.0 μ . This extended region ...
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Сторінка 27 - Committees of the National Academy of Sciences, the American Association for the Advancement of Science, the...
Сторінка 434 - That all money received from the sale of any products or the use of any land or resources of said forest reserves shall be covered into the Treasury of the United States, and for a period of five years from the passage of this act shall constitute a special fund available, until expended, as the Secretary of Agriculture may direct, for the protection, administration, improvement, and extension of Federal forest...
Сторінка 3 - President of the United States. Chancellor. — MELVILLE W. FULLER, Chief Justice of the United States. Members of the Institution: WILLIAM H.
Сторінка 173 - No right to the use of water for land in private ownership shall be sold for a tract exceeding one hundred and sixty acres to any one landowner, and no such sale shall be made to any landowner unless he be an actual bona fide resident on such land, or occupant thereof residing in the neighborhood of said land, and no such right shall permanently attach until all payments therefor are made.
Сторінка 106 - The knowledge that the head of the most prominent scientific institution of America believed in the possibility of human flight was one of the influences that led us to undertake the preliminary investigations that preceded our active work. He recommended to us the books which enabled us to form sane ideas at the outset. It was a helping hand at a critical time, and we shall always be grateful.
Сторінка 5 - States as ex officio members, three members of the Senate, three members of the House of Representatives, and six citizens, "two of whom shall be residents of the city of Washington and the other four shall be inhabitants of some State, but no two of them of the same State.
Сторінка 22 - Total 72,700 ADVISORY COMMITTEE ON PRINTING AND PUBLICATION. The committee on printing and publication has continued to examine manuscripts proposed for publication by the branches of the Institution and has considered various questions concerning public printing and binding. Twenty-five meetings of the committee were held during the year and 106 manuscripts were passed upon. The personnel of the committee is as follows : Dr. Frederick W. True, head curator of biology, United States National Museum,...
Сторінка 313 - I was looking at a reflection of the illuminated slit from one of its faces. This thought was scarcely more than momentary; then the true Interpretation flashed upon me. The light of the nebula was monochromatic, and so, unlike any other light I had as yet subjected to prismatic examination...
Сторінка 308 - I was looking, — namely, to extend his novel methods of research upon the Sun to the other heavenly bodies. A feeling as of inspiration seized me. I felt as if I had it now in my power to lift a veil which had never before been lifted ; as if a key had been put into my hands which would unlock a door which had been regarded as forever closed to man — the veil and door behind which lay the unknown mystery of the true nature of the heavenly bodies. This was especially work for which I was to a...
Сторінка 311 - The silver-bromide gelatine plate, which I was the first, I believe, to use for photographing the spectra of stars, except for its grained texture, meets the need of the astronomer at all points. This plate possesses extreme sensitiveness ; it is always ready for use ; it can be placed in any position ; it can be exposed for hours ; lastly, immediate development is not necessary, and for this reason, as I soon found to be necessary in...