| 单词 | astatic |
| 例句 | In course of time both the original form of single needle galvanometer and mirror galvanometer were improved by introducing the astatic principle and weakening the external controlling magnetic field. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z We can increase the strength of the field about the needle, and at the same time decrease its pointing-power by using an astatic needle. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity Such a helix is caused to stand between the two poles N's' of an astatic system. Fragments of science, V. 1-2 Quartz fibres have two great advantages over other forms of suspension when employed for any kind of torsion balance, from an ordinary more or less "astatic" galvanometer to the Cavendish apparatus. On Laboratory Arts Horizontal and vertical astatic system are also used—Figs. Scientific American Supplement, No. 643, April 28, 1888 In a form of astatic needle galvanometer devised by Professor A. Broca of Paris, the pair of magnetized needles are suspended vertically and parallel to each other with poles in opposite directions. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z This coil, etc., may be used in connection with an astatic needle. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity When it is so far sunk that its lower end rests upon the table, the upper end finds itself between the poles N´S´ of the astatic system. Fragments of science, V. 1-2 This magnet is capable of rendering the needle less sensitive or of making it astatic. Scientific American Supplement, No. 421, January 26, 1884 Then along the brow of the pass writhed a wisp of drifting, twisting flakelets, idling hither and yon, astatic and aimless, settling in a hollow. Pardners But in astatic instruments it is better to place the magnets in such a way that the two branches shall be in the same vertical plane. Scientific American Supplement, No. 492, June 6, 1885 The most convenient way will be to use two coils, one on each side of the astatic needle. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity It is manifest that if a second helix be placed between the poles SN with a cylinder within it, the action upon the astatic magnet may be exalted. Fragments of science, V. 1-2 Hang the astatic needle so that the wire between the two parts will not quite touch the coil. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity By this the astatic needle is suspended and protected from air currents. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity Were the line that joins the two poles vertical, the system would be perfectly astatic in a uniform field, since each magnet in particular would then be perfectly astatic. Scientific American Supplement, No. 492, June 6, 1885 The presence of the current is easily shown with the astatic detectors. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity The iron cylinder is thus converted into a strong magnet, attracting one of the poles, and repelling the other, and consequently deflecting the entire astatic system. Fragments of science, V. 1-2 This is a degree of sensitiveness that cannot be obtained with any of the astatic instruments known up to the present. Scientific American Supplement, No. 492, June 6, 1885 |
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