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How to Work With the Spectroscope: A Manual of Practical Manipulation With ...
John 1835-1925 Browning
No preview available - 2021
absorption bands action adapted adjustable angle appear arranged attached Automatic Automatic Spectroscope battery body bright lines Browning's carbon rods Chemical circle close coloured complete containing described desired diagram Direct-Vision direction dispersive power ditto dry air edges Electric Lamp examined experiments extra eye-piece field of view fixed flame focus front give glass head inch Induction Coil instrument JOHN BROWNING Lantern lens light liquids LONDON Mahogany McClean's means measuring metals method Micro-Spectroscope Micrometer Microscope milled Miniature Spectroscope motion mounted moving object observer obtained obtaining the Spectra placed plate platinum pleasure position Price prisms quart RAIN Rain-band Rain-band Spectroscope reading reflecting Regulator removed Salts scale screen screw seen showing shown side sliding slit solar spectrum spark Spark Condenser spectra Spectrum Analysis SPECTRUM APPARATUS Speculum stand Star Spectroscope substance taking telescope tube turning whole wire
Page 35 - SCHELLEN'S SPECTRUM ANALYSIS, in its application to Terrestrial Substances and the Physical Constitution of the Heavenly Bodies. Translated by JANE and C. LASSELL; edited, with Notes, by W. HUGGINS, LL.D. FRS With 13 Plates (6 coloured) and 223 Woodcuts. 8vo. price 28s. CELESTIAL OBJECTS for COMMON TELESCOPES.
Page 29 - Remove a, and open the slit by means of the milled head, not shown in cut, but which is at right angles to d d. When the slit is sufficiently open, the rest of the apparatus acts like an ordinary eyepiece, and any object can be focussed in the usual way. Having focussed the object, replace a, and gradually close the slit till a good spectrum is obtained. The spectrum will be much improved by throwing the object a little out of focus. Every part of the spectrum differs a little from adjacent parts...
Page 29 - E, square-headed screw, opening and shutting a slit to admit the quantity of light required to form the second spectrum. Light, entering the round hole near E, strikes against the right-angled prism which we have mentioned as being placed inside the apparatus, and is reflected up through the slit belonging to the compound prism. If any incandescent object...
Page 29 - ... is a tube made to fit the microscope to which the instrument is applied. To use this instrument, insert g like an eyepiece in the microscope tube, taking care that the slit at the top of the eyepiece is in the same direction as the slit below the prism. Screw on to the microscope the object-glass required, and place the object whose spectrum is to be viewed on the stage. Illuminate with stage mirror if transparent, with mirror and Lieberkiihn and darken well if opaque, or by side-reflector bull's-eye,...
Page 29 - DD, an apparatus for holding a small tube, that the spectrum given by its contents may be compared with that from any other object on the stage.
Page 29 - 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 against a very small prism, suitably placed inside the apparatus, and is reflected up through the compound prism, forming a spectrum in the same field with that obtained from the object on the stage. a is a brass tube carrying the compound direct-vision prism.
Page 30 - ... Disappointment will occur in any attempt at delicate investigation, if this direction is not carefully attended to. When the spectra of very small objects are to be viewed, powers of from \ in.
Page 20 - BROWNING'S NEW LARGE AUTOMATIC ELECTRIC LAMP. In this Lamp both carbons are moved by the electricity of the battery employed (without the aid of clockwork) ; the light remains uniform in height, and more steady in action than any of the expensive regulators previously introduced.
Page 28 - 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 any object whose spectrum it is desired to compare with that of the object placed on the stage of the Microscope.