British Encyclopedia: Or, Dictionary of Arts and Sciences, Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Τόμος 9Mitchell, Ames, and White, 1821 |
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... distances . See MICROMETER . IV . A Quadrant , for a description of which , and its several uses , we refer to the article QUADRANT . We may , how- ever , observe , that besides Hadley's quadrant , which is described there , we have the ...
... distances . See MICROMETER . IV . A Quadrant , for a description of which , and its several uses , we refer to the article QUADRANT . We may , how- ever , observe , that besides Hadley's quadrant , which is described there , we have the ...
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... distance of which is too great to be observed by the micrometer . Let A B ( Plate Observato- ry , fig 1. ) represent an arch of a circle containing ten or twelve degrees well di- vided , having a strong plate C D , for its radius ...
... distance of which is too great to be observed by the micrometer . Let A B ( Plate Observato- ry , fig 1. ) represent an arch of a circle containing ten or twelve degrees well di- vided , having a strong plate C D , for its radius ...
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... distance ( the greater the better ) in the horizontal di- rection of the intersection of the cross wires , and in a place where it can be illuminated in the night time by a lan- tern hanging near it ; which mark , be ing on a fixed ...
... distance ( the greater the better ) in the horizontal di- rection of the intersection of the cross wires , and in a place where it can be illuminated in the night time by a lan- tern hanging near it ; which mark , be ing on a fixed ...
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... distance is 17 inches , and aperture 2.45 inches , and furnished with six differ- ent eye - tubes ; so that its magnifying powers extend from 44 to 168. The telescope in this equatorial may be brought parallel to the polar axis , as in ...
... distance is 17 inches , and aperture 2.45 inches , and furnished with six differ- ent eye - tubes ; so that its magnifying powers extend from 44 to 168. The telescope in this equatorial may be brought parallel to the polar axis , as in ...
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... distance from the meridian ; then turn the hour circle till the index points pre- cisely at twelve o'clock , and lower the telescope to the horizon , in order to ob- serve some point there in the centre of your glass , and that point is ...
... distance from the meridian ; then turn the hour circle till the index points pre- cisely at twelve o'clock , and lower the telescope to the horizon , in order to ob- serve some point there in the centre of your glass , and that point is ...
Άλλες εκδόσεις - Προβολή όλων
The British Encyclopedia: Or, Dictionary of Arts and Sciences ..., Τόμος 9 William Nicholson Προβολή αποσπασμάτων - 1818 |
The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an ... William Nicholson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
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