Bulletin of the Philosophical Society of Washington, Volume 15co-operation of the Smithsonian Institution, 1913 - Science Vols. 6-12 include the Proceedings of the society's Mathematical Section, 1883-1892. |
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Page 57
... Stresses are set up within it by many forces . It is yielding to those forces and is being deformed beyond its elastic limit . The yielding certainly occurs every year , and probably every day and every hour . This is the proposition ...
... Stresses are set up within it by many forces . It is yielding to those forces and is being deformed beyond its elastic limit . The yielding certainly occurs every year , and probably every day and every hour . This is the proposition ...
Page 58
... stresses are in action . It depends solely upon the elastic constants and the inertia of the material . The bridge engineer in designing his com- petent structure does not consider the length of time the loads are to be applied . On the ...
... stresses are in action . It depends solely upon the elastic constants and the inertia of the material . The bridge engineer in designing his com- petent structure does not consider the length of time the loads are to be applied . On the ...
Page 59
... stresses are but little in excess of the elastic limit , and is faster the greater the excess of stress beyond the elastic limit . To predict the behavior of a failing structure , it is necessary to know how much the stresses exceed the ...
... stresses are but little in excess of the elastic limit , and is faster the greater the excess of stress beyond the elastic limit . To predict the behavior of a failing structure , it is necessary to know how much the stresses exceed the ...
Page 60
... stress - differences as great as 4 tons per square inch at depths of from 600 to 1,000 miles . The stress ... stresses . For example , he writes : " From this discussion it appears that if the earth be solid throughout , then ...
... stress - differences as great as 4 tons per square inch at depths of from 600 to 1,000 miles . The stress ... stresses . For example , he writes : " From this discussion it appears that if the earth be solid throughout , then ...
Page 61
... stresses brought to bear upon it by the continents and mountain ranges . When the subject is approached from this ... stresses , the farther the effective elastic limit falls below the breaking stress - differ- ence . In the case in hand ...
... stresses brought to bear upon it by the continents and mountain ranges . When the subject is approached from this ... stresses , the farther the effective elastic limit falls below the breaking stress - differ- ence . In the case in hand ...
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Common terms and phrases
aërial Allegheny observatory American anomalous dispersion astronomical atmosphere black body black radiation bolometer celestial mechanics century chromosphere cloud computation conclusion continued coöperation Cottage City Darwin's paper deformation density earth earth's atmosphere earthquakes eclipse Eimbeck elastic limit emitted Ephemeris evidence exist experiments fact failing structure failure field Fraunhofer lines furnished gaseous gases harmonic heat idea important Institution instruments interest investigation isostasy Kirchhoff's knowledge Langley light lines load magnetic material mathematical mechanics memoir ment meteorology methods mind motion nature Nautical Almanac Office observations observatory ocean Octave phenomena Phil PHILOSOPHICAL SOCIETY physical physicist practical present President pressure problems Professor Newcomb progress publication published regions SAMUEL PIERPONT LANGLEY scale scientific Simon Newcomb Smithsonian SOCIETY OF WASHINGTON solar spectrum STEFAN-BOLTZMANN law stress-difference stresses sun's surface temperature theory thermodynamics tion tons per square vapor vibrations Wash waterspout yielding
Popular passages
Page 102 - And so these men of Indostan Disputed loud and long, Each in his own opinion Exceeding stiff and strong, Though each was partly in the right, And all were in the wrong!
Page 102 - It was six men of Indostan To learning much inclined, Who went to see the Elephant (Though all of them were blind), That each by observation Might satisfy his mind. The FIRST approached the Elephant, And happening to fall Against his broad and sturdy side, At once began to bawl: "God bless me; but the Elephant Is very like a wall!
Page 163 - ... round her burn, And all the planets in their turn, Confirm the tidings as they roll, And spread the truth from pole to pole. What though, in solemn silence, all Move round the dark terrestrial ball; What though no real voice nor sound Amid their radiant orbs be found ; In reason's ear they all rejoice, And utter forth a glorious voice ; Forever singing as they shine, The hand that made us is divine.
Page 117 - It has been truly said that the " seeds of great discoveries are constantly floating around us, but they only take root in minds well prepared to receive them.
Page 116 - On two occasions I have been asked, — "Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?
Page 17 - I have thus far had only a purely scientific interest in the results of these labors. Perhaps if it could have been foreseen at the outset how much labor there was to be, how much of life would be given to it, and how much care, I might have hesitated to enter upon it at all. And now reward must be looked for, if reward there be, in the knowledge that I have done the best I could in a difficult task, with results which it may be hoped will be useful to others.
Page 151 - Pacific, which, by half a century of unequaled progress in the arts of life, has made an important contribution to evolutionary science through demonstrating the falsity of the theory that the most ancient races are doomed to be left in the rear of the advancing age — in a word, from every great center of intellectual activity on the globe I see before me eminent representatives of that world advance in knowledge which we have met to celebrate.
Page 16 - I have spoken regarding the group of great leaders in industrial enterprise at Pittsburg, and the name of one of them was now commemorated in the preface of Langley's "Experiments in Aerodynamics," as follows : "If there prove to be anything of permanent value in these investigations, I desire that they may be remembered in connection with the name of the late William Thaw, whose generosity provided the principal means for them.
Page 19 - Carolina, was signally successful. A half dozen or more papers illustrating the various advances made in the study of the spectrum were also issued about this time. The building of the large aerodrome and of models to aid in its construction was rapidly being pushed ahead. Since the successful flight of the first aerodrome in 1896, a further possibility of increased power with comparative lightness had come with the employment of the gas engine, and this was experimented upon with a view to determining...
Page 25 - I have been able to faintly trace the lines of a great mind and a great soul, one that left a powerful impress upon the knowledge and thinking of the country in which he was born and the time in which he lived, and his name and his fame are bound to be handed down through all posterity. Yet he valued these labors and the results which sprung from them but little when compared with the affection of his kin and of his friends — affections not many in number nor easily obtained, for he was, as I have...