Nature . AN ACHROMATIC COMBINATION,COMBINING THE DEFINITION OF A MICROSCOPE WITH THEPORTABILITY OF A POCKET LENS. If yon carry a small Platyscopic Pocket Lens (which every observer ofNature ought to do).—Grant Allen in Krurojledge. Tht Platyscopic Lens is in\-aluable to botanists, mineralogists, or ento-mologists, as it focuses about three limes 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, zo, and 30 diams.; the lowest power, haWng the largestfield; is the
Nature . AN ACHROMATIC COMBINATION,COMBINING THE DEFINITION OF A MICROSCOPE WITH THEPORTABILITY OF A POCKET LENS. If yon carry a small Platyscopic Pocket Lens (which every observer ofNature ought to do).—Grant Allen in Krurojledge. Tht Platyscopic Lens is in\-aluable to botanists, mineralogists, or ento-mologists, as it focuses about three limes 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, zo, and 30 diams.; the lowest power, haWng the largestfield; is the best adapted for general use. The Lenses are-set in Ebonite Cells, and mounted in Tortoisesbell Frames. Price o/tlu Platyscopic Lens, mounted in Tortoiseskell, magnifying either lo, 15, 20, or 30 diameters, each power, I5s, - In nicketised German Silver, each pmver. 17s. 6d. Illustrated Description sent free. JOHN BROWNING, 63 , W,C. THE TOURISTS ANERM (WHITESIDE-COOKS.). For Measuring Altitudes without Calculation. Illustrated Price Lists Frke by Post. Made only by NEGRETTI & ZAMBRA, SCIENTIFIC INSTRUMENT MAKERS to THE QUEEN, 38 HOLBORN VIADUCT, BRANCHES : 45 CORNHILL; 122 REGENT STREET. Telephone : Xo. ;;33 Address: Xegretti, London. NA TURE [December i, i< CHARITY COMMISSION. In the Matter of the Charity consisting of the Chelsea Physic•Garden, in the Parish of Chelsea, in the County of London, andthe Charities called The City Parochial Foundation, in the•County of London and elsewhere ; regulated by the CentralScheme made under the City of London Parochial Charitiesj\cts, 18S3, on February 23, 1891, as modified by a Scheme of?the Charity Commissioners of May 28, 1897 ; and In the Matter of The Charitable Trusts Acts, 1853 to 1894. By direction of the Board of Charity Commissioners for Eng-land and Wales, NOTICE is hereby given that an Order is proposed?to be made by them after the expiration of one cale
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
