CHEMICALS. We compel QUARTZ to grind QUARTZ. Crushing and Grinding Address for new circular BAUGH & SONS, Philadelphia. PARK, BENJAMIN & BRO., Engineers & Experts in Patent Causes. Consulting Engineers and Experts for HOLLY MANUFACTURING CO. SIEMIN ANDERSON STEEL CO. 235 BROADWAY, NEW YORK CITY. Searches into and reports on state of any art. Reports on practicability, novelty, etc., of inventions and industrial processes. United States and Foreign Patents solicited. jan '81 1y Philadelphia Hydraulic Works. Rear of 245 SOUTH THIRD ST. STEAM ENGINE BUILDERS -AND CONTRACTORS FOR WATER-WORKS Steam Pumps, Hydraulic Presses, Blowing Engines, Air Compressors and Mining Machinery. HEAVY WORK A SPECIALTY. june '81 ly BUSH HILL IRON WORKS. JAMES MOORE, (Successor to MATTHEWS & MOORE) ENGINEER, MACHINIST, FOUNDER AND BOILERMAKER. Cor. Sixteenth and Buttonwood Streets, Philad'a. Castings of Every Description. Rolling Mill and Furnace Equipments Complete. Rolls turned for Rails, Beams, Angles, and all shapes of Iron, Steel or Composition Metals, for Sugar Mill, Saw Mill and Grist Mill Machinery, and Millwrighting in general. Flue, Tubular and Cylinder Boilers and all kinds of Tank and Plate Iron Work, dec '80 ly THE HARLAN & HOLLINGSWORTH COMPANY Wilmington, Delaware. ESTABLISHED IN 1836. BUILDERS OF IRON STEAMSHIPS, Steamboats and Iron Sailing Vessels of every description, Engines, Boilers and Machine Work in general, Large Basin Dry Dock on Simpson's Patent IN CONNECTION WITH THEIR WORKS. New York Office, ROOM 90, BOREEL BUILDING. jan '81 ly ESTABLISHED 1828. INCORPORATED 1876. I. P. MORRIS CO., PORT RICHMOND IRON WORKS, PHILADELPHIA, Manufacturers of HEAVY & SPECIAL MACHINERY, BOILERS & TANKS. jan '81-1y STRONG'S PATENT Feed Water Heater and Purifier. For the Washing and Concentration of Gold, Silver, Copper, Lead, Zinc, Iron and other Ores Correspondence Solicited. Close Concentrations of Low Grade Ores. 144 South Fourth Street, Philad’a. ROGERS, STUART & SILL, Limited, june '81 ly EDMUND DRAPER, MANUFACTURER OF FIRST-CLASS ENGINEERS' & SURVEYORS' INSTRUMENTS, No. 226 Pear Street, Philadelphia. ESTABLISHED IN 1830. apl. '80 1yr. THE LEVYTYPE COMPANY OF PHILADELPHIA Executes all manner of ENGRAVINGS for Catalogues, Circulars, or for Scientific Purposes, with special regard to accuracy of details and artistic effect, at rates far below any others now being offered. nov '80 ly Address LEVYTYPE COMPANY, 7th & Chestnut Sts., Philad'a, Pa. JOSEPH ZENTMAYER, MANUFACTURER OF Microscopes & Microscopic Apparatus 147 S. FOURTH ST., PHILA. MICROSCOPES FROM $50 TO $1000. CATALOGUES ON APPLICATION. nov '80 ly DRAWING INSTRUMENTS OF THE BEST MAKE. SWISS, GERMAN SILVER AND BRASS. DRAWING PAPER, PAINTS, MATERIALS, &C., ENGINEERS' TRANSITS, LEVELS, SURVEYORS' COMPASSES STEEL TAPE MEASURES. Prices and Illustrated Catalogues sent on application. Mention this journal. WILLIAM Y. MCALLISTER, nov80ly No. 728 Chestnut Street, Philad'a. ESTABLISHED 1783. C. T. MILLIGAN, 728 Chestnut Street, Phila., Manufacturer and Importer of STEREOPTICONS, MAGIC LANTERNS, LANTERN SLIDES. PHILOSOPHICAL APPARATUS and MEDICAL BATTERIES. CATALOCUES CRATIS. nov80 1y Awarded First Premium for Improved Galvanic and Faradic Batteries at Penna. State Fair, 1880. A. F. FLEISCHMANN, -MANUFACTURER OF ELECTRICAL APPARATUS And Supplies for Experiments, Electro-Medical Batteries, Electrodes for Medical Application, Battery Supplies and Chemicals, Induction Coils, Silk and Cotton Covered Wire, Faradic and Galvanic Batteries, Burglar Alarms, Signal Bells, Annunciators, Models, Brass work, &c. No. 27 SOUTH TENTH STREET, PHILAD'A, PA. Orders and Repairing promptly attended to. Catalogues sent on application. nov '80 ly |