 | Henry Enfield Roscoe - 1870 - 514 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small...the stage. a is a brass tube carrying the compound direct-vision prism. 6, a milled head, with screw motion to adjust the focus of the achromatic eye-lens.... | |
 | John Henry Pepper - 1869 - 722 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small...the stage A is a brass tube carrying the compound direct-vision prism. B is a milled head, with screw motion to adjust the focus of the achromatic we-lens.... | |
 | sir Henry Enfield Roscoe - 1869 - 396 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small...the stage. a is a brass tube carrying the compound direct-vision prism. N b, a milled head, with screw motion to adjust the focus of the achromatic eye-leus.... | |
 | sir Henry Enfield Roscoe - 1870 - 452 pages
...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 adjust the focus of the achromatic eye-lens. c, milled head, with screw motion to open or shut the slit vertically. Another screw at right... | |
 | Henry Enfield Roscoe - 1873 - 542 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small...the stage. a is a brass tube carrying the compound direct-vision prism. b, a milled head, with screw motion to adjust the focus of the achromatic eye-leus.... | |
 | sir Henry Enfield Roscoe - 1873 - 550 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small...field with that obtained from the object on the stage. « is a brass tube carrying tbe compound direct^vision prism. I, a milled head, with screw motion to... | |
 | Henry Enfield Roscoe - 1873 - 552 pages
...object on the stage. a is a brass tube carrying the compound direct>vision prism. b, a milled bead, with screw motion to adjust the focus of the achromatic eye- lens. c, milled head, with screw motion to open or shut the slit vertically. Another screw at right angles to... | |
 | John Henry Pepper - 1877 - 764 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes against a very small...the stage A is a brass tube carrying the compound direct-vision prism. B is a milled head, with screw motion to adjust the focus of the achromatic eye-lens.... | |
 | John Browning (F.R.A.S.) - 1878 - 80 pages
...whose spectrum it is desired to compare with that of the object placed on the stage of the Microscope. This second beam of light strikes against a very small...field with that obtained from the object on the stage (Fig. 24, page 46). A (Fig. 23) is a brass tube carrying the compound direct-vision prism, and has... | |
 | Every boy - 1881 - 932 pages
...desired to compare with that of the object placed on the stage of the microscope. This second beam of n light strikes against a very small prism suitably...with that obtained from the object on the stage. A, the brass tube carrying the compound direct-vision prism, has a sliding arrangement for roughly focussing.... | |
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... focus the slit. A side slit capable of adjustment admits when required a second beam of light from any object whose spectrum it is desired to compare with that of the object placed on the stage of the microscope. This second beam of light strikes... 
