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 |
No interior do livro
Resultados 1-5 de 68
Página 24
... wood . The first , fifth , and sixth , are two feet nine inches in diameter ; the second , third , and fourth , are three feet six inches The second and third carry square sails , and all carry fore - and - aft sails . The standing ...
... wood . The first , fifth , and sixth , are two feet nine inches in diameter ; the second , third , and fourth , are three feet six inches The second and third carry square sails , and all carry fore - and - aft sails . The standing ...
Página 38
... woods , figures , rocks , etc. , on the copper plates ; the work is thus done much more quickly than by hand , and boys are employed at it in the place of skilled engravers . A portion of the writ- ing , also , on the copper plates , is ...
... woods , figures , rocks , etc. , on the copper plates ; the work is thus done much more quickly than by hand , and boys are employed at it in the place of skilled engravers . A portion of the writ- ing , also , on the copper plates , is ...
Página 41
... wooden cross - ties , and can be put down at much less expense than the ordinary way . The rails are joined together , and made continuous by means of a splice- wedge inserted in cleets about ten inches long , cast with the rail ...
... wooden cross - ties , and can be put down at much less expense than the ordinary way . The rails are joined together , and made continuous by means of a splice- wedge inserted in cleets about ten inches long , cast with the rail ...
Página 49
... wood , unless performed very slowly ; and that charring or painting is highly injurious to any but seasoned timber , as it effectually prevents the drying of the inner part of the wood , in which , con- sequently , fermentation and ...
... wood , unless performed very slowly ; and that charring or painting is highly injurious to any but seasoned timber , as it effectually prevents the drying of the inner part of the wood , in which , con- sequently , fermentation and ...
Página 50
... wood in drying loses a portion of its carbon , and the more in proportion as the temperature is higher . There is in wood that has been properly seasoned a toughness and elasticity which is not found in rapidly dried wood ; and this is ...
... wood in drying loses a portion of its carbon , and the more in proportion as the temperature is higher . There is in wood that has been properly seasoned a toughness and elasticity which is not found in rapidly dried wood ; and this is ...
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