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acid actinic action angle aperture appear arrangement axis blue body bright called camera cause centre circle cloth colour combination concave consists construction converging convex crystalline lens David Brewster diameter diaphragm direction distance diverging double edges Edition effect Engravings equal experiments extreme face fall feet figure fixed focal length focus glass greater green heat horizontal illumination Illustrations inches incidence inclined increase lamp lantern lens lenses less light look magnifying manner means measured microscope mirror moved nearly object object-glass observer obtained optical parallel passing photographic picture piece placed plane plate polarised position principle prism produced radius rays rays of light reflected reflector refraction retina screen seen shown side solar space spectrum spherical substances surface telescope tion transparent tube turned violet visible yellow
Page 74 - To the same degree of Refrangibility ever belongs the same colour, and to the same colour ever belongs the same degree of Refrangibility.
Page 5 - THE PRINCE OF THE HOUSE OF DAVID; or, Three Years in the Holy City.
Page 26 - Lamborn. 2s. 134. METALLURGY OF SILVER AND LEAD, by RH Lamborn. 2s. 135. ELECTRO-METALLURGY, by A. Watt. Is. 6d. 138. HANDBOOK OF THE TELEGRAPH, by R. Bond. Is. 143. EXPERIMENTAL ESSAYS— On the Motion of Camphor and Modern Theory of Dew, by C. Tomlinson. Is.
Page 102 - Thus, if the light be homogeneous, a bright line of light will be formed under the centre of the opaque object AB, outside which will be dark lines, and then bright and dark lines alternately. If the arrangement of these lines be examined, they will be found to be hyperbolic, as exhibited in Jig.
Page 74 - ... very little of the violet. The yellow space, which has not been much absorbed, has increased in breadth. It occupies part of the space formerly covered by the orange on one side, and part of the space formerly covered by the green on the other. Hence it follows, that the blue glass has absorbed the red light, which, when mixed with the yellow light, constituted orange, and has absorbed also the blue light, which, when mixed with the yellow, constituted the part of the green space next to the...
Page 26 - EMMENS. is. 6d. 152. PRACTICAL HINTS FOR INVESTING MONEY. With an Explanation of the Mode of Transacting Business on the Stock Exchange. By FRANCIS PLAYFORD, Sworn Broker.
Page 24 - Is. 34. STEAM ENGINE, by Dr. Lardner. Is. 59. STEAM BOILERS, their Construction and Management, by R. Armstrong. With Additions by R. Mallet. Is.
Page 73 - Coloured fluids, such as black and red ink, though equally homogeneous, stop or absorb different kinds of rays, and when exposed to the sun they become heated in different degrees ; while pure water seems to transmit all the rays equally, and scarcely receives any heat from the passing light of the sun. When we examine more. minutely the action of...