Constitution, List of Meetings, Officers, Committees, Fellows and Members, Masalah 33 |
Dari dalam buku
Hasil 1-5 dari 49
Halaman iii
... heat . By CHAS . E. MUNROE On the variation of the resistance of carbon under pressure . By T. C. MEN- DENHALL . A possible method of electrical communication between vessels at sea . By A. GRAHAM BELL 129 130 130 132 • · · . On the ...
... heat . By CHAS . E. MUNROE On the variation of the resistance of carbon under pressure . By T. C. MEN- DENHALL . A possible method of electrical communication between vessels at sea . By A. GRAHAM BELL 129 130 130 132 • · · . On the ...
Halaman iv
... heating from a central source . By SIR FREDERICK BRAMWELL Flood regulator . By JAMES DILLON . Automatic sounder . By ... heat engines . By R. H. THURSTON Three problems in river physics . By J. B. JOHNSON 276 • 276 Steam engine practice ...
... heating from a central source . By SIR FREDERICK BRAMWELL Flood regulator . By JAMES DILLON . Automatic sounder . By ... heat engines . By R. H. THURSTON Three problems in river physics . By J. B. JOHNSON 276 • 276 Steam engine practice ...
Halaman 8
... heat , etc. As has already been intimated , the lunar theory is not in a satis- factory state . I do not mean , of course , that the moon's deviations from the predicted path are gross and palpable , —such , for instance as could be ...
... heat , etc. As has already been intimated , the lunar theory is not in a satis- factory state . I do not mean , of course , that the moon's deviations from the predicted path are gross and palpable , —such , for instance as could be ...
Halaman 9
... heat- the radiant energy it sends us , and to its temperature , seem to be the most attractive at present , especially for the reason that the results of the most recent inves- tigators seem partially to contradict those obtained by ...
... heat- the radiant energy it sends us , and to its temperature , seem to be the most attractive at present , especially for the reason that the results of the most recent inves- tigators seem partially to contradict those obtained by ...
Halaman 15
... heat , the extent of its atmosphere , and the nature of the corona , we find the most radical differences of opinion . The difficulties of all solar problems are , of course , greatly enhanced by the enormous difference between solar ...
... heat , the extent of its atmosphere , and the nature of the corona , we find the most radical differences of opinion . The difficulties of all solar problems are , of course , greatly enhanced by the enormous difference between solar ...
Isi
163 | |
169 | |
193 | |
198 | |
261 | |
267 | |
274 | |
289 | |
lxv | |
lxvi | |
lxxix | |
lxxxii | |
52 | |
59 | |
76 | |
98 | |
110 | |
115 | |
129 | |
138 | |
160 | |
295 | |
302 | |
303 | |
307 | |
311 | |
315 | |
323 | |
324 | |
345 | |
346 | |
349 | |
351 | |
355 | |
Edisi yang lain - Lihat semua
Istilah dan frasa umum
ABSTRACT acid affinity Albany albuminoids alcohol astronomical atoms attraction Baltimore battery Boston Cambridge carbon cell cent Charles Chas chemical action chemical affinity Cincinnati circuit Cleveland College color color-blind Conn determined Died March Edward electrical potential electro-motive force electromotive force ether experiments F. W. Putnam George give gravitation Harvard College Observatory Harvard Observatory Haven heat Henry Inst investigation James John Joseph Louis magnetic Mass mathematical measured mechanical metal method Minn Minneapolis Miss molecules Montreal motion observations Observatory obtained Ohio 30 ohms P. O. Box paper Philadelphia plane plate present Prof relation resistance Salem Section selenium Smith solar solution speculum metal standard candle Standing Committee stars superficial energy surface temperature Tenn theory tion Univ University vibrations Walnut St Washington William Yale College York
Bagian yang populer
Halaman 45 - Under the whip of external necessity their backward culture is compelled to make leaps. From the universal law of unevenness thus derives another law which, for the lack of a better name, we may call the law of combined development — by which we mean a drawing together of the different stages of the journey, a combining of separate steps, an amalgam of archaic with more contemporary forms.
Halaman xxv - The objects of the Association are, by periodical and migratory meetings, to promote intercourse between those who are cultivating science in different parts of Amer1ca, to give a stronger and more general impulse and more systematic direction to scientific research, and to procure for the labors of scientific men increased facilities and a wider usefulness.
Halaman 22 - ... there is no reason to deny the final cessation of the sun's activity, and the consequent death of the system. But while this hypothesis seems fairly to meet the requirements of the case, and to be a necessary consequence of the best knowledge we can obtain as to the genesis of our system and the constitution of the sun itself, it must, of course, be conceded that it does not yet admit of any observational verification. N"o measurements within our power can test it, so far as appears at present.
Halaman 290 - ... a high water discharge is an influence which is adding to the heights of all the sand bars on the river. The greater the stage, the higher the bars and the deeper the pools become ; and so far is this from facilitating the discharge, that, in the language of the Secretary of the Mississippi River Commission, "the effect of an approaching flood is to impede its own discharge, and the impediment outlasts the flood.
Halaman 17 - ... great as to render quantitative calculations unsafe, and make positive conclusions more or less insecure. We can pretty confidently infer the presence of iron and hydrogen and other elements in the sun by appearances which we can reproduce upon the earth; but we cannot safely apply empirical formulae (like that of Dulong and Petit, for instance), deduced from terrestrial experiments, to determine solar temperatures: such a proceeding is an unsound and unwarrantable extrapolation, likely to lead...
Halaman 23 - ... tons a day on every square mile. As regards the theory of Siemens, the matter has been, of late, so thoroughly discussed, that we probably need spend no time upon it here. To say nothing as to the difficulties connected with the establishment of such a far-reaching vortex as it demands, nor of the fact that the temperature of the sun's surface appears to be above that of the dissociation point of carbon compounds, and hence above the highest heat of their combustion, it seems certainly demonstrated,...
Halaman 26 - ... into its present path by the attraction of Jupiter, as generally admitted, it must have had its velocity reduced from about eleven miles a second to five. Now, it is very difficult, if not out of the question, to imagine any possible configuration of the two bodies and their orbits which could result in so great a change. While I am by no means prepared to indorse as conclusive all the reasoning in the article referred to, and should be very far from ready to accept the author's alternative theory...
Halaman 16 - ... of solution. Thus, while experiments upon the velocity of light and heliometric measurements of the displacements of Mars among the stars agree remarkably in assigning a smaller parallax (and greater distance of the sun) than seems to be indicated by the observations of the late transits of Venus, and by methods founded on the lunar motions, on the other hand, the meridian observations of Mars all point to a larger parallax and smaller distance. While still disposed to put more confidence in...
Halaman 8 - ... present time, the most effective tests suggested are from the transits of Mercury and from the eclipses of Jupiter's satellites. On the whole, the result of Professor Newcomb's elaborate and exhaustive investigation of all the observed transits, together with all the available eclipses and occultations of stars, tends rather to establish the sensible constancy of the day, and to make it pretty certain (to use his own language) that "inequalities in the lunar motions, not accounted for by the...
Halaman 31 - The next two columns give the number of nights on which they were observed with the meridian photometer, and the resulting magnitude. The details of these measures and a comparison with various other determinations of their light will be found in the Harv. Observ. Annals, Vol. XIV. The last columns give the number of stars in each of the charts, and the corresponding number of stars contained in the same portions of the Durchmusterung. Stars suitable for standards must next be selected by the help...