Nature . 3B x:o 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 v^holepacked in polished MahoganyCase, £6:8:6 R. & J. JSECK:, Ltd, 68 CORNHILL, LONDON, AN ACHROMATIC COMBINATION. COMBINING THE DEFINITION OF A MICROSCOPE WITH THEPORTABILITY OF A POCKET LENS. If you carry a small Platyscopic Pocket Lens (which every observer ofNature ought to do).—Grant Allen in Knoivlecige. Tht Platyscopic Lens is invaluable to botanists, mineralogists, or e
Nature . 3B x:o 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 v^holepacked in polished MahoganyCase, £6:8:6 R. & J. JSECK:, Ltd, 68 CORNHILL, LONDON, AN ACHROMATIC COMBINATION. COMBINING THE DEFINITION OF A MICROSCOPE WITH THEPORTABILITY OF A POCKET LENS. If you carry a small Platyscopic Pocket Lens (which every observer ofNature ought to do).—Grant Allen in Knoivlecige. Tht Platyscopic Lens is invaluable to botanists, mineralogists, or enicr-mologists, as it focuses about three times as far from the object as theCoddington Lenses. This allows opaque objects to be examined easily. The Platyscopic Lens is made of four degrees of power, magnifyingrespectively lo, 15, 20, and 30 diams. ; the lowest power, having the largestfield, is the best adapted for general use. The Lenses are set in Ebonite Cells, and mounted in Tortoiseshell Frames. Price of the Platyscopic Lens, moitnted in Tortoiseshell, magnifying either 10, 15, 20, or 30 diameters, each power, 15s. In nickelised Gertnan Silver, each poiver, 17s. 6d. Illustrated Description sent free. JOHN BROWNING. 63 STRAND, LONDON. SPECTACLESELECTRIC LIGHT, INCANDESCENT GAS, And oth
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
