Annual of Scientific Discovery: Or, Year-book of Facts in Science and Art for ...1864 |
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Zadetki 1–5 od 23
Stran 111
... photographic portrait- ure , as carried on in the present day ; and asked his hearers to disa- buse their minds of a common error into which most people fall , namely , that a photograph , because it is taken as it were by machinery ...
... photographic portrait- ure , as carried on in the present day ; and asked his hearers to disa- buse their minds of a common error into which most people fall , namely , that a photograph , because it is taken as it were by machinery ...
Stran 112
... photographic portraits , and you will at once see that the hands or feet , or any object prominently brought for- ward , are larger than they should be , to be in due proportion . This defect , of course more visible in the case of a ...
... photographic portraits , and you will at once see that the hands or feet , or any object prominently brought for- ward , are larger than they should be , to be in due proportion . This defect , of course more visible in the case of a ...
Stran 114
... photographic pictures is generally consid- ered to date back only to the year 1839 , when Daguerre , in Paris , and Fox Talbot , in England , made public their results . Some recent in- vestigations in England have , however , rendered ...
... photographic pictures is generally consid- ered to date back only to the year 1839 , when Daguerre , in Paris , and Fox Talbot , in England , made public their results . Some recent in- vestigations in England have , however , rendered ...
Stran 116
... Photographic Society there was exhibited , side by side with the above - mentioned metal plates , a photograph of a neatly - laid breakfast - table taken upon paper by Wedgwood , and the information about it tended to the conclusion ...
... Photographic Society there was exhibited , side by side with the above - mentioned metal plates , a photograph of a neatly - laid breakfast - table taken upon paper by Wedgwood , and the information about it tended to the conclusion ...
Stran 117
... photographic purposes . In my instrument , a movement of the sensi- tive plate , one - hundredth of an inch on either side of the true focus , visibly injures the image . In the great achromatic at Cambridge , on the contrary , the ...
... photographic purposes . In my instrument , a movement of the sensi- tive plate , one - hundredth of an inch on either side of the true focus , visibly injures the image . In the great achromatic at Cambridge , on the contrary , the ...
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action ammonia animals appear aqueous vapor astronomers atmosphere atoms Aye-Aye body British Association carbonic acid Carboniferous cause cent chemical color containing depth Devonian diameter discovery distance earth effect electric equal existence experiments exposed fact feet fire French gases give glass graphite gun-cotton gunpowder gypsum heat hundred hydrochloric acid hydrogen inches insects iron length less light liquid London magnesium manufacture mass matter metal miles minute moon mountains nature nearly nitrogen observed obtained organic oxygen paper passed phenomena photographic plants plate portion pounds present pressure produced Prof putrefaction quantity rays recent remarkable result rifled rock rubidium safe salt shot side silica soda solar solar parallax solid species spectrum stars steam substance sulphur sulphuric acid sun's surface temperature thallium thickness tion transmutation of species tube velocity vessel weight whole
Priljubljeni odlomki
Stran 170 - It is conceivable that the various kinds of matter, now recognized as different elementary substances, may possess one and the same ultimate or atomic molecule existing in different conditions of movement. The essential unity of matter is an hypothesis in harmony with the equal action of gravity upon all bodies. We know the anxiety with which this point was investigated by Newton, and the care he took to ascertain that every kind of substance, ' metals, stones, woods, grain, salts, animal substances,'...
Stran 256 - As with an invisible trowel, the mass is divided and subdivided into smaller and smaller portions, until it is reduced to an aggregation of granules not too large to build withal the finest fabrics of the nascent organism. And, then, it is as if a delicate finger traced out the line to be occupied by the spinal column, and moulded the contour of the body...
Stran 306 - Thus, by means of repeated selection alone, the length of the ears has been doubled, their contents nearly trebled, and the " tillering" power of the seed increased five-fold.
Stran 288 - The Negro exhibits permanently the imperfect brain, projecting lower jaw, and slender bent limbs of a Caucasian child some considerable time before the period of its birth. The aboriginal American represents the same child nearer birth. The Mongolian is an arrested infant newly born. And so forth.
Stran 77 - The natural philosopher of to-day may dwell amid conceptions which beggar those of Milton. So great and grand are they, that, in the contemplation of them, a certain force of character is requisite to preserve us from bewilderment.