JUL 7 1910 MICROSCOPE OBJECTIVES. REVISED PRICE LIST. Ar the suggestion of Drs. Carpenter, Michael Foster, and other eminent Microscopists, Mr. HENRY CROUCH has, during the last two years, carried out a series of experiments, with the view of producing MICROSCOPE OBJECTIVES of the highest class, at a cost that will bring them within the reach of all Students of Natural History, &c., Professional or Amateur. As the result, he is enabled to offer them at the following reduced prices :— From the in. to the in. this series is fitted with a new Adjustment for covered and uncovered. A new Illustrated Catalogue of Microscopes, &c., will be ready in a few days, and forwarded on receipt of Four Stamps. HENRY CROUCH, 51, LONDON WALL, LONDON, E.C. THREE DOORS FROM LATE ADDRESS. a LONDON INTERNATIONAL EXHIBITION, 1851.-Two PRIZE MEDALS. LONDON INTERNATIONAL EXHIBITION, 1862.-TWO PRIZE MEDALS. PARIS INTERNATIONAL EXHIBITION, 1867.-THE GOLD MEDAL. THOMAS ROSS, OPTICIAN, MANUFACTURER OF MICROSCOPES, TELESCOPES, PHOTOGRAPHIC LENSES, etc., etc., etc., 7, WIGMORE STREET, CAVENDISH SQUARE, W. (REMOVED FROM FEATHERSTONE BUILDINGS, HOLBORN), LONDON, Has the pleasure of announcing that he is now prepared to supply a second ANTERIOR ARRANGEMENT to his in. and in. Object Glasses, which, when substituted for the ordinary front combinations, convert them into IMMERSION OBJECTIVES, giving most brilliant definition. This addition, which is strongly recommended, thus enables the Microscopist to use these Powers either with or without water. The Price of the Immersion Arrangement for the in. is £2; for the in. £2. 10s. ROSS'S 4-INCH AND 5-INCH OBJECTIVES, For the Examination of large Specimens of Mineralogical, Botanical, and Entomological Objects. These Low Powers, which have been constructed more particularly to use with ROSS'S TANK MICROSCOPE, are readily convertible into very convenient ACHROMATIC POCKET LENSES, of 2 and 3 inches focus respectively, by screwing the Optical arrangement into a German-silver Pocket Frame, specially made for that purpose. Price of the Frame, 20s. CATALOGUES FREE ON APPLICATION. |