Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1911 |
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Сторінка 146
... dropping of the weights the machine is given an impulse , this method being found to be preferable to the catapult which Mr. Langley had devised and which failed him on two occasions when trying to launch his machine . In plate 4 ...
... dropping of the weights the machine is given an impulse , this method being found to be preferable to the catapult which Mr. Langley had devised and which failed him on two occasions when trying to launch his machine . In plate 4 ...
Сторінка 183
... drops in the canal , and used to pump water to elevations above the main canal . The average elevation of the irrigable area is 4,700 feet above sea level ; the temperature ranges from 15 ° below to 100 ° above zero , and the rainfall ...
... drops in the canal , and used to pump water to elevations above the main canal . The average elevation of the irrigable area is 4,700 feet above sea level ; the temperature ranges from 15 ° below to 100 ° above zero , and the rainfall ...
Сторінка 189
... drop of water from the main canal is made to lift a portion of the water to a higher level to supply the high - line canal . This is accomplished by means of vertical turbines and centrifugal pumps mounted on the same shaft , and the ...
... drop of water from the main canal is made to lift a portion of the water to a higher level to supply the high - line canal . This is accomplished by means of vertical turbines and centrifugal pumps mounted on the same shaft , and the ...
Сторінка 219
... drop out automatically when the engine is running , without any attention from the engineer , and a written report is made weekly on one of the inspection blanks previously mentioned , which shows whether this safety feature is being ...
... drop out automatically when the engine is running , without any attention from the engineer , and a written report is made weekly on one of the inspection blanks previously mentioned , which shows whether this safety feature is being ...
Сторінка 221
... dropping the load , while several members of a wire rope may be broken without inter- fering with its service , and the broken strands give warning of weak- ness which would not be apparent in a chain . One of the most important safety ...
... dropping the load , while several members of a wire rope may be broken without inter- fering with its service , and the broken strands give warning of weak- ness which would not be apparent in a chain . One of the most important safety ...
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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...