Nature . BROWNINGS PLATYSCOPIC LENS. With Larger Angles, Increased Field, and Improved Definition Complete for Slides, Microscopic Objects, and Spectra. Price £18. For Lecturers on Light, Colour, and Colour Photography, &c. Sole Makers: NEWTON & CO., 3 FLEET STREET, LONDON. NEW MICROSCOPE THE BRITISH STUDENTS. Microscope Stand No. 55, asfigured, with Iris Diaphragm,One Bye-piece; Double Nose-piece, Two Object-glasses, 2/3and 1/6. adjusted to be inabout focus, and the wholepacked In polished MahoganyCase, £6:8:6 R. Sc J. SECK, Ltd., 68 CORNHILL, LONDON,

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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience