Oldest and Largest Manufacturers in the United States.=
VULCANIZED RUBBER FABRICS For Mechanical Purposes. Air Brake Hose A Specialty. RUBBER MATS, RUBBER MATTING AND STAIR TREADS.
=NEW YORK BELTING & PACKING CO., 15 PARK ROW, N. Y.=
JOHN H. CHEEVER, Treas., Branches: 167 Lake St., Chicago; 308 Chestnut St., Phila. 52 Summer St., Boston. J. D. CHEEVER, Dep'y Treas.
Wells, Oil and Gas Wells, drilled by contract to any depth, from 50 to 3000 feet. We also manufacture and furnish everything required to drill and complete same. Portable Horse Power and Mounted Steam Drilling Machines for 100 to 600 ft. Send 6 cents for illustrated catalogue. =Pierce Well Excavator Co. New York.=
Dialogues, Tableaux, Speakers, for School, Club, & Parlor, Best out. Catalogue free. T. S. Denison, Chicago.
Send for Circulars. =C. E. Jones & Bro. Cincinnati, O.=
By Prof. H. C. Boltom.--Chemical societies, new elements, atomic weights, spectrum analysis, form of matter, affinity and chemical action, electrolytic thermal chemistry, new views of chemical reaction, chemical dynamics, chemical physics, liquefaction of gases, chemical industries, nomenclature, progress in organic chemistry, the aromatic series of compounds, synthesis of organic compounds, physiological and sanitary chemistry, tendency of modern chemistry. Contained in SCIENTIFIC AMERICAN SUPPLEMENT, No. =546.= Price 10 cents. To be had at this office and from all newsdealers.
Four stamps and dater on one handle. Simple and convenient. Send 50 cents for sample and trade price list.
To parties already established, or about to form new companies, _special inducements_ will be offered, and correspondence is solicited with a view to locating in the thriving city of Brockton, Mass., on the old Colony R. R., 30 minutes from Boston and one hour's ride from Fall River. Present population 22,000, 40 per cent increase in the past 5 years. Address SECRETARY BUSINESS MEN'S CLUB, Brockton, Mass.
THE CHEAPEST AND BEST: PHOTO ENGRAVING CO. 67 PARK PLACE, NEW YORK. ENGRAVING FOR ALL ILLUSTRATIVE AND ADVERTISING PURPOSES
SOLID EMERY WHEELS.--By T. D. Paret.--Early forms of emery wheels and their defects. Vulcanite wheels. The tanite wheels. Testing of tanite wheels at Stroudsburg. Best working speeds for emery wheels. Bursting of emery wheels. Tests for emery wheels. Comparative merits of American and English emery wheels. With 2 engravings. Contained in SCIENTIFIC AMERICAN SUPPLEMENT, No. =538.= Price 10 cents. To be had at this office and from all newsdealers.