 | 1828 - 420 sider
...the fluid telescope proposed by Dr Blair the construction is the same, the fluid having been enclosed in the object-glass itself. Nor could any change in...(according- to the glass employed) between the limits .298 and .334 ; which circumstance has enabled me to place the fluid correcting lens at a distance... | |
 | 1828 - 450 sider
...proposed by Dr Blair, the construction was the same, the fluid having been inclosed in the object glass itself. Nor could any change in this arrangement in...(according to the glass employed) between the limits '298 and -334; which circumstance has enabled me to place the fluid correcting lens at a distance from... | |
 | 1828 - 406 sider
...the fluid telescope proposed by Dr Blair the construction is the same, the fluid having been enclosed in the object-glass itself. Nor could any change in...case, however, is very different with the sulphuret of carboji. The dispersive ratio here varies (according to the glass employed) between the limits .298... | |
 | 1829 - 424 sider
...arrangement in either case be introduced with advantage, because the dispersive ratio between the glasses iu the former instance, and between the glass and fluid...concave correcting medium far enough back to be of any sen. sible advantage. The case, however, is very different with the sulphuret of carbon. The dispersive... | |
 | 1830 - 470 sider
...because the dispersive ratio between the glasses in the former instance, and between the glass and the fluid in the latter, is too close to admit of bringing...be of any sensible advantage. The case however is widely different with sulphuret of carbon. The dispersive ratio here varies (according to the glass... | |
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Blair the construction is the same, the fluid having been enclosed in the object-glass itself. Nor could any change in this arrangement in either case be introduced with advantage ; because the dispersive ratio between the glasses in the former instance,... 