Proceedings of the American Academy of Arts and Sciences, Том 48Metcalf and Company, 1913 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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Страница 2
... similar sunburn in the vicinity of the affected eye. Whether this particular sort of effect is produced also by ultra violet rays of slightly greater wave length, say up to 320 fin or 330 fin, is a matter of some dispute, but most ...
... similar sunburn in the vicinity of the affected eye. Whether this particular sort of effect is produced also by ultra violet rays of slightly greater wave length, say up to 320 fin or 330 fin, is a matter of some dispute, but most ...
Страница 7
... similar quartz cell was used , particularly in work on arc lamps . In this case the Euphos glass used to cut out the ultra violet portion of the spectrum was perma- nently affixed to one of these cells and either the plain quartz cell ...
... similar quartz cell was used , particularly in work on arc lamps . In this case the Euphos glass used to cut out the ultra violet portion of the spectrum was perma- nently affixed to one of these cells and either the plain quartz cell ...
Страница 12
... similar work . The result was to show that the transmission of the crown glass was 54.7 % of the transmission found for the Euphos glass . In other words , nearly one half of the total ultra violet energy in this lamp was of wave length ...
... similar work . The result was to show that the transmission of the crown glass was 54.7 % of the transmission found for the Euphos glass . In other words , nearly one half of the total ultra violet energy in this lamp was of wave length ...
Страница 14
... similar to the one already in use was constructed and filled with distilled water . The ratio of the absorption between this new cell and the old cell was then determined . From a slight difference in thickness or in polish of the ...
... similar to the one already in use was constructed and filled with distilled water . The ratio of the absorption between this new cell and the old cell was then determined . From a slight difference in thickness or in polish of the ...
Страница 23
... similar , considering their wide difference in character . The Nernst and tungsten lamps produce rather more total ultra violet than the Cooper - Hewitt tube , most of the output being toward the visible spectrum . The Nernst lamp ...
... similar , considering their wide difference in character . The Nernst and tungsten lamps produce rather more total ultra violet than the Cooper - Hewitt tube , most of the output being toward the visible spectrum . The Nernst lamp ...
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Страница 109 - Discount to booksellers 25% ; to members 50%, or for whole sets 60%. The individual articles may be obtained separately. A price list of recent • articles is printed on the inside pages of the cover of the Proceedings. Complete Works of Count Rumford. 4 vols., $5.00 each. Memoir of Sir Benjamin Thompson, Count Rumford, with Notices of his Daughter.
Страница 773 - Statuary and casts of sculpture for use as models or for art educational purposes only; regalia and gems, where specially imported in good faith for the use and by order of any society incorporated or established solely for religious, philosophical, educational, scientific, or literary purposes, or for the encouragement of the fine arts, or for the use and by order of any college, academy, school, seminary of learning, orphan asylum, or public hospital in the United States, or any State or public...
Страница 42 - THE wisest man could ask no more of Fate Than to be simple, modest, manly, true, Safe from the Many, honored by the Few ; To count as naught in World, or Church, or State, But inwardly in secret to be great...
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Страница 29 - CEA — (I.) Experiments on the Effect of Freezing and other low Temperatures upon the Viability of the Bacillus of Typhoid Fever, with Considerations regarding Ice as a Vehicle of Infectious Disease. (II.) Statistical Studies on the Seasonal Prevalence of Typhoid Fever in various Countries and its Relation to Seasonal Temperature, pp.
Страница 33 - If we can say that we now know the physical and biological conditions of the great ocean basins in their broad general outlines — and I believe we can do so — the present state of our knowledge is due to the combined work and observations of a great many men belonging to many nationalities, but most probably more to the work and inspiration of Alexander Agassiz than to any other single man.
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Страница 696 - ... cum semel institerunt vestigia certa viai, sic alid ex alio per te tute ipse videre talibus in rebus poteris caecasque latebras insinuare omnis et verum protrahere inde. quod si pigraris paulumve recesseris ab re, 410 hoc tibi de plano possum promittere, Memmi : usque adeo largos haustus e fontibu...