BINOCULAR MICROSCOPE STAND "A" (ONE-THIRD ACTUAL SIZE). MECHANICAL CONCENTRIC ROTATING AND ADJUSTABLE STAGE, CENTERING AND ROTATING SUB-STAGE, AND IRIS DIAPHRAGM. Binocular, Five Eye-pieces and Iris Diaphragm... $225.00 175.00 CLINICAL THERMOMETERS WITH INEFFACABLE INDEX. MICROSCOPES FROM $5.00 TO $1,350.00. W. H. WALMSLEY, Manager 921 Chestnut Street, Philadelphia. Illustrated and Priced Catalogue of 133 pages mailed to any address on receipt of three stamps. JOHN AKHURST, TAXIDERMIST, NO. 19 PROSPECT STREET, BROOKLYN, N, Y., Keeps constantly on hand for sale, Sheet Cork for insect boxes-size, 12 x 8% x -$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. DIATOMS!! Fine slides by new process; from newly (1877) found parts of Richmond and Petersburg fields-the finest showing yet made. 60 cents each, 6 for $2.50, postpaid Circulars for stamp. C. L. PETICOLAS, 635 Eighth Street, North, Richmond. Va. THE MOST RECENT DISCOVERY! Prepared Microscopic Slides of Living Animalculæ. Having obtained of Prof. Weber, of Berlin, the SOLE AGENCY for his new and wonderful discovery, I am prepared to furnish microscopic slides containing LIVING ANIMALCULÆ, warranted to live from one to three months. These objects are most carefully prepared, and afford an opportunity for investigation never before attained, the glass slides themselves being imperishable, and always to be used for the examination of new material, after life shall have ceased in the original preparation. Each Slide is accompanied by an index and a plate of ninety-seven illustrations, the same being useful for constant reference and information, as also of affording the investigator the pleasure of determining himself the contents of the slide. No Microscopist should fail to avail himself of this most Rare Opportunity, As the glass slide itself is so constructed as to be an indispensable accessory for the prolonged investigation of microscopic life in water. Sent by mail, carefully packed, on receipt of $1 each. To all those who may so desire, I shall forward the fuli instructions and materials necessary for mounting, in consideration of the additional cost of 25 cents. C. F. PRENTICE, 1 Cortlandt Street, New York. JAMES W. QUEEN & CO., OPTICIANS, 924 Chestnut Street, Philadelphia, MANUFACTURERS OF MICROSCOPES, And Other Optical Instruments. SECOND-HAND MICROSCOPES. BECK'S, CROUCH'S, ROSS', NACHET'S HARTNACK'S, ZENTMAYER'S AND OTHER MAKERS, FROM 25 TO 50 PER CENT. BELOW SEND THE CATALOGUE PRICES. LIST. NOTICE. We have just received from Carl Zeiss, of Jena, a sample lot of his celebrated Objectives, which are for sale at moderate prices. From Ross & Co., a few of Wenham's Reflex Illuminators, price $17.50. From Edmund Wheeler, some fine Podura Scales, P. angulatum, N. rhomboides, A. pellucida, and other tests, besides many other objects, Animal, Vegetable and Mineral. We would call special attention to the fact that we have greatly reduced the prices of glass slips, thin glass covers, and ebonite cells. Send for the List. Ross' 1 inch, 26 degrees..... 20 Wales' 4 inch, 10 degrees... 8 LOUIS H. NOE, Elizabeth, N. J. Spencer's 1 inch, Student SCIENTIFIC AND MECHANICAL-CHEAP. Catalogues sent on application. E. WALKER, (Care of this Journal), Box 4875, New York. SOMETHING NEW. I have completed arrangements whereby I am enabled to furnish MICROSCOPIST'S RULINGS on glass, absolutely accurate, and at very low prices. I would especially recommend the 12-band rulings. The bands vary in lines by 10000 to the inch, and are very similar to the noted Nobert's lines, while their low price puts them within the reach of all interested in the microscope. G. S. WOOLMAN, Optician, 116 Fulton Street, New York. MICROSCOPES AND ACCESSORIES OF ALL MAKERS. YOUNG THE Special Notice to Subscribers. As our journal is too small and too low-priced to claim the attention of news dealers, we are com SCIENTIST. pelled to rely almost wholly upon subscriptions PUBLISHED MONTHLY. PROSPECTUS. The subject matter with which we shall chiefly concern ourselves is very distinctly set forth in the title of the Journal. The following are the details of the several departments, and will serve to explain our aims and claims: PRACTICAL SCIENCE.-Simple methods of performing experiments, and of constructing homemade apparatus, will occupy much of our attention. In the early numbers clear and accurate directions will be given for making cheap microscopes that will show many of the hidden beauties and wonders of nature; telescopes that will show many of the most interesting celestial objects; simple voltaic batteries that will make electro-magnets, operate telegraphs, etc. In this department directions for making collections, for preserving specimens of Natural History, and for forming and managing aquaria, etc., will find a place. AMATEUR MECHANICS.-Directions for making designs and working drawings, and for working with lathes, carpenter's tools, scroll saws, etc.; and for soldering, cementing, varnishing, polishing, etc., special attention being given to new methods and processes, where these are found to be real improvements. The various operations mentioned will be applied to the production of special articles of practical utility. SCIENTIFIC NEWS.-In this department we will condense and explain the most important and interesting scientific discoveries as they are developed. NEW BOOKS.-New scientific and practical books will be duly noticed, so that those who desire complete and recent information on any subject may know where to get it. CORRESPONDENCE.-In this department we intend to place our readers in communication with each other, and in this way we hope to secure for every one just such aid as may be required for any special work on hand. sent direct to this office, and as the journal is new and untried, many persons would no doubt like to examine a few numbers before becoming regular subscribers. To those who wish to make a "trial trip" with us we will send the first four numbers for FIFTEEN CENTS, which is less than the regular rates, as we feel journal, we offer the following liberal terms: 5 7 66 10 66 Advertisements, 30 cents per line. $1.25 2.00 2.75 3.50 To avoid delay and mistakes address all communications to "THE YOUNG SCIENTIST, Box 4875, New York," and make all checks and orders payable to John Phin. The following are the titles of a few "How to Read a Drawing." jects to Observe, and How to Find and "The Science of Magic." A Series of arti- How to Make a Balloon." EXCHANGES.-An exchange column, like that which has been such a marked success in the Journal of Microscopy, will be opened in the YOUNG SCIENTIST. Yearly subscribers who may wish to exchange tools, apparatus, books, or the products of their skill, can state what they have to offer and what they want," without charge. Buying and selling must, of course, be carried on in the advertising columns. ILLUSTRATIONS.-The journal will make no claims to the character of a "picture book," but wherever engravings are needed to make the descriptions clear they will be furnished. Terms-Fifty Cents per year. Postage stamps received at their full value. Hints on Fret and Scroll Sawing." "How to Become a Good Mechanic; what Studies to Pursue and how to Study." "Finishing Wood-Work." "How to Make a Magnet out of a Poker without a Battery.' "The Magic of Science." A Series of the most recent and wonderful parlor experiments. THE NEW $20 MICROSCOPE. This is a serviceable and thoroughly well-made instrument, and is not to be confounded with those cheap microscopes which are low-priced simply because they are worthless. The foot is of cast iron, and the body inclines to any angle. The tube through which the body moves is of brass, and the body itself is also of brass, and heavily nickel-plated, so as to move with the utmost smoothness. The movement is effected by a very finely-cut rack and pinion, the milled heads being very large, so that the utmost delicacy and precision may be attained and consequently powers as high as a one-fifth can be used with good effect. It is capable of doing good service in the hands of the phys ician and the naturalist, and being very simple and easily managed, it is just the thing for the family. The Stage is vulcanite; Mirror swings so as to give oblique light; Diaphragm underneath the stage; the Body has the "Society" screw; and the Objectives are by Gundlach-achromatic and well corrected. Three years ago Objectives of the same quality could not be bought for less than the price now asked for the whole microscope. Two Eye-Lenses. Powers, 55, 95, 130 and 225 diameters. Those who wish to get a good microscope and yet do not know just what they want, can buy this microscope with the privilege of exchanging it at full value for a better instrument, any time within one year. This Microscope has been elaborated at our suggestion by Mr. Gundlach, Price in fine Black Walnut Case, with fittings for Accessories, THE INDUSTRIAL PUBLICATION COMPANY, MISFIT CARPETS. (Trade Mark Copyrighted.) English Brussels, Three-Ply and Ingrain. Elegant Stair Rods; also Stair Carpets, Carpet Lining, Velvet Rugs, Oil Cloths, Crumb Cloths, Mattings, &c., &c., very cheap, at the old place, 112 FULTON STREET, NEW YORK. Carpets carefully packed and sent to any part of the United States, C. O. D., free of Express Charges. Call or send for Explanatory Circular and Price List. Just Ready. Fourth Edition. The Microscope in Medicine. 550 pages, nearly 600 Figures. By LIONEL S. BEALE, M. B., F. R. S. Two Hundred Pages and Thirty Plates have been added to this Edition, and the work has been revised throughout. This work has been eagerly expected for some time. SCROLL SAWS. J. A. BENDALL Fancy Woods, Designs, Saw with copper Boiler, to drive light Lathes Scroll Saws, G. WEBSTER PECK, Chambers Street, New York. TO ART STUDENTS. Mrs. Kempson (JULIA H. BEERS will receive in her Studio, at METUCHEN, N. J., & limited number of pupils in PAINTING and DRAWING. 4 PAINTING ON CHINA A SPECIALTY. |