Philosophical MagazineTaylor & Francis, 1839 - Physics |
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Common terms and phrases
61 Cygni a.m. Id acid gas action æther alcohol alloxan ammonia analysis animal appears atmosphere atoms barytes Basilosaurus calm carbonic acid carboniferous chemical chloride Cloudy colour considered containing copper crystals deposits Devon dew-point distilled earth effect elevation equations evaporation experiments feet fluid formation formula fossil geological heat hydrogen inches light lime limestone magnetic malaria marsupial mass mean memoir metal molars muriatic nature nearly nitric acid observations obtained Old Red Sandstone Owen oxide oxygen paper phænomena Phil Philosophical Magazine plates platina platinum polarized portion potash precipitate present produced Prof Professor pyroxylic pyroxylic spirit quantity rain refractions remarks resin respect rocks Royal salt Silurian Society solution specific gravity specimens stars steam Stonesfield strata substance sulphate sulphuric acid surface tain teeth temperature theory tion tube vapour voltaic zinc
Popular passages
Page 210 - In the summer of 1835 I made in this way a great number of representations of my house in the country, which is well suited to the purpose, from its ancient and remarkable architecture. And this building I believe to be the first that was ever yet known to have drawn its own picture.
Page 210 - I dip it into a weak solution of common salt, and wipe it dry, by which the salt is uniformly distributed throughout its substance. I then spread a solution of nitrate of silver on one surface only, and dry it at the fire. The solution should not be saturated, but six or eight times diluted with water. When dry, the paper is fit for use.
Page 148 - P. DE MG On two Casts in Sandstone of the impressions of the Hind Foot of a gigantic Chirotherium, from the New Red Sandstone of Cheshire.
Page 361 - A. diminished by the value of an annuity on the joint lives of A.
Page 210 - In conducting this operation it will be found that the results are sometimes more and sometimes less satisfiictory in consequence of small and accidental variations in the proportions employed. It happens sometimes that the chloride of silver is disposed to darken of itself, without any exposure to light: this shows that the attempt to give it sensibility has been carried too far. The object is, to approach to this condition as near as possible without reaching it; so that the substance may be in...
Page 243 - The usual course of periodical winds, or such as remarkably prevail during certain seasons, with the law of their diurnal progress, both as to direction and intensity ; at what hours, and by what degrees they commence, attain their maximum, and subside ; and through what points of the compass they run in so doing. 6thly. The existence of crossing currents at different heights in the atmosphere, as indicated by the courses of the clouds in different strata.
Page 545 - Cincinnati, read at the last meeting, made the following Report, which was adopted. " The Committee to whom was referred the Communication of...
Page 188 - If the solution be diluted with water to which a few drops of sulphuric acid have been added, the...
Page 205 - The copy of a painting or the profile, immediately after being taken, must be kept in an obscure place ; it may, indeed, be examined in the shade> but in this case the exposure should be only for a few minutes ; by the Light of candles or lamps, as commonly employed, it is not sensibly affected.
Page 136 - That the progressive and periodical being mixed up with the transitory changes, it is impossible to separate them so as to obtain a correct knowledge and analysis of the former without taking express account of and eliminating the latter...