WESTON DYNAMO-ELECTRIC MACHINE CO Machines for Electro-plating, Electrotyping, Electric CONDIT, HANSON & VAN WINKLE NEWARK, NJ. U.S.A. ROCK SECTIONS FOR THE MICROSCOPE MADE TO And also Thin Sections of Minerals, Gems, Meteorites, Corals, Fossils, Bone, and all hard materials. Specimens cut and polished to order. American Rocks furnished (over 200) both in hand specimens and in thin sections, separately or in Standard Collections for Lithologists. Catalogue Now Ready. Polariscope Collection FOR MICROSCOPISTS. Thirty Thin Sections on short slides in neat racked box. Price $15. Tools, Lathes, Books, Specially Fitted Microscopes, etc. ALEXIS A. JULIEN, School of Mines, Columbia College, Fiftieth Street, corner Fourth Avenue, Agent in St. Paul, Minn., HERBERT W. SMITH. NEW YORK CITY. LONDON BOOK STORE. REMOVAL. Rare, Valuable and Curious English and Foreign Books. JOHN EVANS, Importer, 21 Park Row, New York. Catalogue No. 16 now ready. EDWARD B. CONWAY, TAXIDERMIST, JOHN AKHURST, TAXIDERMIST, NO. 19 PROSPECT STREET, BROOKLYN, N, Y., Keeps constantly on hand for sale, Sheet Cork for insect boxes-size, 12 x 3% x 4-$1.25 per dozen sheets. Entomological pins, of Klager and other German makers, $1.25 per 1,000 Also, dealer in Native and Exotic Bird Skins, Birds' Eggs, Insects, etc., etc. N. B-The above prices do not include the cost of transportation. TWO OUNCES OF BEST THIN GLASS CIR CLES and SQUARES, in equal proportions, sent post free on receipt of two dollars. One dozen and a half of unmounted objects for one dollar, post free. Address CHAS. PETIT, 151 High Street, Stoke Newington, London, England. E. SEYMOUR has removed his MINERAL AGENCY from 52 Beekman Street to the spacious Rooms recently occupied by Messrs. Schermerhorn & Co., No. 14 Bond street. Colleges, Academies, Schools and Amateurs supplied with Cabiners or Single Specimens, American and Foreign; also with FOSSILS and SHELLS. Send for Catalogue. A large assortment constantly on hand. Cabinets sold on commission. Specimens for Microscopic Slides. Fire on the Hearth. 635 Eighth Street, North, Richmond, Va. The following are a few testimonials from well-known Microscopists: NEWARK, N. J., Dec. 18, 1876. "I took the three beautiful slides-Nottingham, Petersburg and Richmond--you sent me, to a meeting of our scientific association, where they were much admired." A. MEAD EDWARDS, M. D. KENDALLVILLE, Ind., Feb. 12, 1877. G. C. GLATTE. "The slides are splendid." MARLBOROUGH, Mass., March 10, 1877. "The Richmond is the VERY BEST SLIDE OF ANY DIATOMACEOUS EARTH, I have ever seen." J. N. JACKMAN. VAN WERT, Ohio, March 12, 1877. have given your slide enough notice to pronounce :1 most beautiful and interesting." D. L. CORBIN, M. D. cleaning these deposits, excelling anything I have ever seen in this line." W. W. SILVER, 102 Fulton Street, New York, PHOTOGRAPHER Landscapes, Marine, Architectural, Mechanical and Interior Photographing of every description in any part of the country. Also, COPYING, QUICK AND CHEAP. Stained Sections. Finely Mounted Slides, Stained Sections, Sugar Cane, "You have attained a rare perfection in the art of PLATINUM. BRUSSELLS, 31 Rue de la Vaune, May 20, 1877. "I thank you for the two beautiful slides, which reached here perfectly safe." JULIEN DEBY. (Belgian Commissioner to the Centennial.) NEW YORK, Nov. 3, 1877. "I am in receipt of your slide of Richmond Diatoms, which I have carefully examined, and can say that it is the best slide of diatoms I have ever seen." R J. STOWEY, JR. Just Published. ROSS ON THE MICROSCOPE. FULLY ILLUSTRATED. This is the celebrated article contributed by Andrew Ross to the "Penny Cyclopædia," and quoted so frequently by writers on the Microscope. Carpenter, in the last edition of his work on the Microscope, and Brooke in his treatise on Natural Philosophy, both refer to this article as the best source for full and clear information in regard to the principles upon which the modern achromatic Microscope is constructed. It should be in the library of every person to whom the Microscope is more than a toy It is written in simple language, free from abstruse technicalities. 1 Vol., 12mo. Cloth. Price 75 cents. WANTED. Journal would like to hire, or, if price is low, would like to purchase, an inverted 25 BOND STREET, NEW YORK. Native Platinum and Scrap purchased. Electrical Instruments WILLIAM WOOD & CO., 27 Great Jones Street, New York. Sent by Mail, Postpaid, on Receipt of Price. MICROSCOPIC OBJECTS. BY THOMAS DAVIES. THE MICROSCOPE AND MICROSCOPIC TECH-THE PREPARATION AND MOUNTING OF GANOT'S PHYSICS. Elementary Treatise on Phy- THE AMATEUR MICROSCOPIST; OR, VIEWS A MANUAL OF HISTOLOGY. By Prof. 8. STRICKER, of Vienna, Austria; in co-operation with TH. MEYNERT, F. VON RECKLINGHAUSEN, MAX SCHULTZE, W. WALDEYER, and others. Translated by Henry Power, of London; James J. Putnam and J. Orne Green, of Boston; Henry C. Eno, Thomas E. Satterthwaite, Edward C. Seguin, Lucius D Bulkley, Edward L. Keyes, and Francis E. Delafield, of New York. American Translation edited by Albert H. Buck, Assistant Aural Surgeon to the New York Eye and Ear Infirmary. A most superb Octavo volume of over 1,100 pages, with four hundred and thirty-one illustrations on wood, engraved in the finest style. Price in muslin, $10.00; leather, $11.00. MICRO-CHEMISTRY OF POISONS, including their Physiological, Pathological, and Legal Relations: adapted to the use of the Medical Jurist, Physician, and General Chemist. By THEODORE G. WORMLEY, M. D. With seventy-eight illustrations on steel. In one 8vo. volume, bound in muslin. Price $10.00. IN ADDITION TO THE ABOVE, W. W. & CO. KEEP IN STOCK A LARGE ASSORT- EDWIN HBROWN 7 Warren Street, New York, SOLICITOR OF U. S. AND FOREIGN TRADE MARKS AND PATENTS. Make a note of the time when you first think of an invention, date and keep all writings, sketches, drawings and models of it. It will be well to have persons sign the former as witnesses, and this may be done without exhibiting the contents. To establish title to your invention, even after obtaining a patent, you may have to prove that you made it before any one else, and never gave it up. BINOCULAR MICROSCOPE STAND "A" (ONE-THIRD ACTUALESIZE). MECHANICAL CONCENTRIC ROTATING AND ADJUSTABLE STAGE, CENTERING AND ROTATING SUB-STAGE, AND IRIS DIAPHRAGM. Monocnlar, Three Eye-pieces and Iris Diaphragm..... $225.00 -175.00 Binocular, Five Eye-pieces and Iris Diaphragm.. W. H. BULLOCH, Optician, 126 Clark Street, Chicago, Ill. |