The Year-book of Facts in Science and ArtCharles W. Vincent, James Mason Simpkin, Marshall, and Company, 1844 |
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Page 28
... silver medal , for his plan of forming Breakwaters , of which the following description has appeared in the Mechanics ' Magazine , No. 1039 . The principle of this breakwater is taken from what may be ob- served in every part of the ...
... silver medal , for his plan of forming Breakwaters , of which the following description has appeared in the Mechanics ' Magazine , No. 1039 . The principle of this breakwater is taken from what may be ob- served in every part of the ...
Page 51
... silver so well . Before employing it , it is filtered , and is thus rendered perfectly clear , iron and a little chloride of silver remaining on the filter . " I effect the plating , " says Major Jew- reinoff , " by means of a galvanic ...
... silver so well . Before employing it , it is filtered , and is thus rendered perfectly clear , iron and a little chloride of silver remaining on the filter . " I effect the plating , " says Major Jew- reinoff , " by means of a galvanic ...
Page 63
... silver about one - twentieth of an inch in thickness , polished very smooth and bright . The dimensions were as follows : - Diameter of the base of frustrum of reflector .. Distance of vertex from base .. Inches . 16 . 3.75 Distance of ...
... silver about one - twentieth of an inch in thickness , polished very smooth and bright . The dimensions were as follows : - Diameter of the base of frustrum of reflector .. Distance of vertex from base .. Inches . 16 . 3.75 Distance of ...
Page 74
... silver sand is preferable ; but yellow sand , or finely - powdered bricks or tiles , may be used . Canvas of an open texture is preferable for covering roofs , and is thus prepared : -Stretch the canvas upon a table or slab , of Roman ...
... silver sand is preferable ; but yellow sand , or finely - powdered bricks or tiles , may be used . Canvas of an open texture is preferable for covering roofs , and is thus prepared : -Stretch the canvas upon a table or slab , of Roman ...
Page 98
... silver - paper by means of a flat brush , and allowed to dry . Sometimes it is covered with a thin coat of copal - varnish to protect it from damp . - Mechanics ' Magazine , No. 1049 . WASHING LINEN . It THE supply of water in Paris is ...
... silver - paper by means of a flat brush , and allowed to dry . Sometimes it is covered with a thin coat of copal - varnish to protect it from damp . - Mechanics ' Magazine , No. 1049 . WASHING LINEN . It THE supply of water in Paris is ...
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Academy of Sciences acid action ammonia Analytical Engine animal apparatus appears atmosphere battery boiler British Association Bude light carbon carbonic acid chemical cloth coal coating colour combustion comet common consists construction containing copper cubic centimetres cylinder David Bogue deposit depth described diameter distance effect electricity employed engine Engravings exhibited experiments feet Fleet Street fossil galvanometer George Cruikshank glass gold heat hydrogen Illustrated inches instrument invention iron length light machine magnetic malic acid Mastodon matter means ment mercury metal minute mode morocco motion nearly nitric acid observations obtained oxide oxygen paper Paris passing Permian phosphorescence pieces piers placed plants plate portion potash present produced purpose quantity rays remarkable Royal sand silver Society solution species specimens steam steel substance sulphate sulphuric acid surface temperature thick tion tube vessel voltaic weight wheel whole wire wood zinc
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Page 287 - Cowper's Poems. With Life and Critical Remarks, by the Rev. THOMAS DALE : and 75 fine Engravings by J. Orrin Smith, from Drawings by J. Gilbert. Two vols. crown 8vo. 24s. cloth ; 84s. morocco. " The handsomest of the editions of Cowper."— SPECTAToR.
Page 241 - Some cause there must be, which would explain how the practice has become a necessary of life to whole nations. But it is surely still more remarkable, that the beneficial effects of both plants on the health must be ascribed to one and the same substance, the presence of which in two vegetables, belonging to different natural families, and the produce of different quarters of the globe, could hardly have presented itself to the boldest imagination.
Page 193 - ... which form the lights of the print, to a sufficient depth ; but in glyphography the depth of these parts is formed by the remaining portions of the white composition on the plate, analogous to the thickness or height of which must be the depth on the block, seeing that the latter is, in fact (to simplify the matter), a cast or reverse, of the former. But if this composition were spread on the plate as thickly as required for this purpose, it would be impossible for the artist to put either close,...