Annual of Scientific Discovery: Or, Year-book of Facts in Science and Art, for [1850]-71, Exhibiting the Most Important Discoveries and Improvements in Mechanics, Useful Arts, Natural Philosophy, Chemistry, Astronomy, Geology, Biology, Botany, Mineralogy, Meteorology, Geography, Antiquities, Etc., Together with Notes on the Progress of Science ... a List of Recent Scientific Publications; Obituaries of Eminent Scientific Men, Etc. ...Gould and Lincoln, 1867 |
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Página 38
... axles , and under different circumstances . The forces which act on these axles may be divided into two classes , one class containing those forces which tend to effect a flexion or bending of the axle , and the other containing those ...
... axles , and under different circumstances . The forces which act on these axles may be divided into two classes , one class containing those forces which tend to effect a flexion or bending of the axle , and the other containing those ...
Página 39
... axle , the largest deflection of the index by flection was 3 1-16 inch , which is equal to a side- draught of 72 cwt . The tension of the extreme fibres of the axle in this case is equal to 252 cwt . per square inch , and the deflection ...
... axle , the largest deflection of the index by flection was 3 1-16 inch , which is equal to a side- draught of 72 cwt . The tension of the extreme fibres of the axle in this case is equal to 252 cwt . per square inch , and the deflection ...
Página 40
... axle . It is joined to each end by the short axles , and so coupled together inside of the hub as to render it as strong as the solid axle . The wheel is pressed on the short axle in the ordinary way , giving the result of a loose and ...
... axle . It is joined to each end by the short axles , and so coupled together inside of the hub as to render it as strong as the solid axle . The wheel is pressed on the short axle in the ordinary way , giving the result of a loose and ...
Página 41
... axle , so that , while running on a straight line , the wheels and axle revolve together in the ordinary manner ; but , upon striking a curve , they act independently , adjusting themselves , whatever the radius may be , without causing ...
... axle , so that , while running on a straight line , the wheels and axle revolve together in the ordinary manner ; but , upon striking a curve , they act independently , adjusting themselves , whatever the radius may be , without causing ...
Página 42
... axle - box laterally , in the direc- tion of the axle , by making the recesses in the axle - box , which receive the face - plates , wider than the plates themselves by inch . But to keep the axle - boxes in position in straight ...
... axle - box laterally , in the direc- tion of the axle , by making the recesses in the axle - box , which receive the face - plates , wider than the plates themselves by inch . But to keep the axle - boxes in position in straight ...
Palavras e frases frequentes
action alloys alumina ammonia amount animal animalcules apparatus appear atmosphere axle body bones breccia carbonic acid cast iron cause cellulose cent chemical chloride coal color containing copper cylinder decomposition deposits depth diameter earth effect electric engine existence experiments fact feet fibres fluid formation fossil furnace fusel oil geological glacier greensand Hadrosaurus heat hundred hyæna hydrogen inches increased less light lime limestone liquid magnesia mass matter metal miles minute motion nature nearly nitric acid observed obtained octahedron odor ordinary organic oxide oxygen paper parchment passing peroxide phosphorescent phosphorus plants plate plough portion potash pounds present pressure produced Prof proportion quantity reäction recently rocks side silica Silurian soda soil solution species specimens steam steel strata substance sulphate sulphuric acid surface temperature thick tion tons tube vegetable vessel weight wheel wire wood zinc
Passagens conhecidas
Página 414 - Book of Facts in Science and Art, exhibiting the most important Discoveries and Improvements in Mechanics, Useful Arts, Natural Philosophy, Chemistry, Astronomy, Meteorology, Zoology, Botany, Mineralogy, Geology, Geography, Antiquities, etc.
Página 277 - A glacier is an imperfect fluid, or viscous body, which is urged down slopes of certain inclination by the mutual pressure of its parts.
Página 312 - ... the species. If a dry season be gradually prolonged, the large mammal will suffer from the drought sooner than the small one ; if such alteration of climate affect the quantity of vegetable food, the bulky herbivore will first feel the effects of stinted nourishment...
Página 312 - ... of any gradual diminution of the size of such species, but is the result of circumstances, which may be illustrated by the fable of the ' Oak and the Reed ; ' the smaller and feebler animals have bent and accommodated themselves to changes which have destroyed the larger species.
Página 406 - The Geology of Pennsylvania. A Government survey, with a general view of the Geology of the United States, Essays on the Coal Formation and its Fossils, and a description of the Coal Fields of North America and Great Britain.
Página 311 - ... species has to maintain against the surrounding agencies that are ever tending to dissolve the vital bond and subjugate the living matter to the ordinary chemical and physical forces.
Página 326 - The case is different with the other two forms of implements, " of which numerous specimens were exhibited ; all indisputably worked by " the hand of man, and not indebted for their shape to any natural " configuration or peculiar fracture of the flint. They present no analogy in " form to the well-known implements of the so-called Celtic or stone period, " which, moreover, have for the most part some portion, if not the whole, of " their surface ground or polished, and are frequently made from other...
Página 286 - When the nature of the sediments is such as to generate great amounts of elastic fluids by their fusion, earthquakes and volcanic eruptions may result, and these — other things being equal — will be most likely to occur under the more recent formation." (Canadian Journal, May 1858, vol. iii. p. 207.) The same views are insisted upon in a paper " On Some Points in Chemical Geology