The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General Literature, 10. köideThomas Spencer Baynes C. Scribner's Sons, 1879 |
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Page 50
... meridian , its north pole of course pointing north . For sometimes used , and file steel is recommended by some authorities . The hardness is important for two reasons , - in the first place , to ensure that the permanent magnetism of ...
... meridian , its north pole of course pointing north . For sometimes used , and file steel is recommended by some authorities . The hardness is important for two reasons , - in the first place , to ensure that the permanent magnetism of ...
Page 52
... meridian , 1 the couple due to the earth's action tending to bring the magnet back to its position of equilibrium will be proportional to sin 0 , hence the current strength will be proportional to tan 0 . 1 This can be done most easily ...
... meridian , 1 the couple due to the earth's action tending to bring the magnet back to its position of equilibrium will be proportional to sin 0 , hence the current strength will be proportional to tan 0 . 1 This can be done most easily ...
Page 163
... meridian arc of France by Mechain and Delambre had for its end the determination of the true length of the " metre " which was to be the legal standard of length of France . tion of the bar in measuring . The manner of transferring the ...
... meridian arc of France by Mechain and Delambre had for its end the determination of the true length of the " metre " which was to be the legal standard of length of France . tion of the bar in measuring . The manner of transferring the ...
Page 165
... meridian is determined either by a theodolite or a portable transit instrument . In the former case the operation consists in observing the angle between a terrestrial object - generally a mark specially erected and capable of ...
... meridian is determined either by a theodolite or a portable transit instrument . In the former case the operation consists in observing the angle between a terrestrial object - generally a mark specially erected and capable of ...
Page 166
... meridian . The first star on passing the central meridional. To determine the direction of the meridian , it is well to erect two marks at nearly equal angular distances on either side of the north meridian line , so that the pole star ...
... meridian . The first star on passing the central meridional. To determine the direction of the meridian , it is well to erect two marks at nearly equal angular distances on either side of the north meridian line , so that the pole star ...
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abundant acid ancient angle appear augite axis basalt beds carbonic carbonic acid centre century character chemical coal coast cone consists contains crust crystalline crystals deposit distance district earth equator eruption existence feet felspar fissures formations fossils Gaelic Galatia gallic acid galls galvanometer Gaur gelatin gems geological globe gneiss granite Greek heat hornblende igneous igneous rocks important iron islands known lake land latitude lava less lime limestone longitude mass materials meridian metamorphic miles mineral mountain observed obtained occur ocean organic original orthoclase parallel Paris passing period plane portion present pressure produced quartz regions remains rise river rocks Roman round sand sandstone schists Scotland sediment shales side siliceous Silurian sometimes species specific gravity square miles stones strata stream structure substance surface temperature thickness tion town traced upper vapour vertical volcanic voyage whole