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" Below the prism is an achromatic eye-piece, having an adjustable slit between the two lenses, the upper lens being furnished with a screw motion to focus the slit. A side slit, capable of adjustment, admits, when required, a second beam of light from... "
Spectrum analysis, 6 lects - Page 219
by sir Henry Enfield Roscoe - 1873
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The Microscope: Its History, Construction, and Application, Being a Familiar ...

Jabez Hogg - 1867 - 1458 pages
...Sorhn-Bnvming Uicro-ipectroKOpt. The prism is contained in a small tube, which can be removed at pleasure. Below the prism is an achromatic eye-piece, having...field with that obtained from the object on the stage. A is a brass tube, carrying the compound direct vision prism. F, a milled head, with screw motion to...
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Chemical News and Journal of Industrial Science, Volumes 15-16

1867 - 680 pages
...arrangement at the upper part on the right side is for the purpose of obtaining a supplementary spectrum from any object whose spectrum it is desired to compare...object placed on the stage of the microscope. This object may be either a solution of permanganate of potash in a small sealed tube, a cobalt blue glass,...
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The Quarterly Journal of Science, Volume 4

1867 - 652 pages
...by direct vision, and there is an arrangement for the purpose of obtaining a supplementary spectrum from any object whose spectrum it is desired to compare...of the object placed on the stage of the microscope ; which object may be either a solution of permanganate of potash in a small sealed tube, a cobalt-blue...
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Monthly Journal of Science, and Annals of Biology, Astronomy ..., Volume 4

James Samuelson, William Crookes - 1867 - 672 pages
...by direct vision, and there is an arrangement for the purpose of obtaining a supplementary spectrum from any object whose spectrum it is desired to compare...of the object placed on the stage of the microscope ; which object may be either a solution of permanganate of potash in a small sealed tube, a cobalt-blue...
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Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of ...

Henry Enfield Roscoe - 1870 - 508 pages
...instrument is represented in Figs. 51 (pnge 173) and 55. The prism is contained in a small tube («), FIG. 55. which can be removed at pleasure, and which...field with that obtained from the object on the stage. a is a brass tube carrying the compound direct-vision prism. 6, a milled head, with screw motion to...
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The Microscope: Its History, Construction, and Application: Being a Familiar ...

Jabez Hogg - 1869 - 814 pages
...Micro-tjactmeopi. The prism is contained in a small tube, which can be removed at pleasure. Below the prism ia an achromatic eye-piece, having an adjustable slit...field with that obtained from the object on the stage. A is a brass tube, carrying the compound direct vision prism, n, a milled head, with screw motion to...
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Spectrum Analysis -- Six Lectures

Henry E. Roscoe - 1869 - 372 pages
...achromatic eyepiece having an adjustable slit between the two lenses ; the upper lens being f FIG. 47. furnished with a screw motion to focus the slit. A...field with that obtained from the object on the stage. a is a brass tube carrying the compound direct-vision prism. &, a milled head, with screw motion to...
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Cyclopadic Science Simplified

John Henry Pepper - 1869 - 722 pages
...conveniently examined, and accurately investigated, by means of Sorby and Browning's new Microspectroscope." slit, capable of adjustment, admits, when required,...field with that obtained from the object on the stage A is a brass tube carrying the compound direct-vision prism. B is a milled head, with screw motion...
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Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of ...

Henry Enfield Roscoe - 1873 - 542 pages
...represented in Figs. 50 (page 183) and 55. The prism is contained in a small tube (a), Fio. 55. -9 which can be removed at pleasure, and which is shown...field with that obtained from the object on the stage. a is a brass tube carrying the compound direct-vision prism. b, a milled head, with screw motion to...
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Principles of Forensic Medicine

William Augustus Guy, David Ferrier - 1875 - 752 pages
...arrangements for placing side by fide a spectrum of the object on the stnge, and (by the side slit) a second beam of light from any object whose spectrum...the object placed on the stage of the microscope. By means of focussing arrangements, with which the apparatus is supplied, the light can bo readily...
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