433, STRAND, LONDON, MANUFACTURING OPTICIAN, WHOLESALE, RETAIL, AND EXFORT. Scientific Instrument Maker to H.M. Government, India Office, Board of Trade, Universities of Oxford, Cambridge, &c., and Greenwich and Kew Observatories, the Governments of Russia, United States, France, Prussia, Turkey, &c. Patentee and Manufacturer of Induction Coils, from £4 4s. 1 in. Spark; 4 in. Spark, £12 12s., 5 in. Spark, £15 15s., 10 in. Spark, £36 15s., and 18 in. Spark, £75. LARGER SIZES MADE TO ORDER. Groves', from 8s. 6d. BATTERIES. Bun Set of 40 Groves', from £16. sen's, from 5s. 6d. per Cell. Medical Batteries, 20 Cells, £5. Smee's, 4s. 6d. Bichromate Fotash do. from 2s. 6d. Zinc Plates, from 3d. each. Bells, Electric, from 2s. Ed. Wire for do. and pushes. Induction Coils, 12s. 6d. Medical Coils, from 7s. 6d. Insulated Wire, Best Cotton covered, from 2s. 6d. per lb., Silk do. 4s. per lb. Spectroscopes, from 17s. 6d. Thermoelectric Piles, from 10s. 6d. Resistance Coils, 10s. Telegraph Models, 16s. Vacuum Tubes, from 2s. Wheatstone's Bridge, £3. Galvanometers, from 7s. 6d., Reflecting do. Keys, Reversers, and Contact Breakers, from 3s. 6d. each. Optical, Mathematical, and Philosophical Apparatus of every Description. Magneto-electric Exploders, 25s.; co. 3 Keys, £3; do. 6 Keys, £6; do. 10 Keys, £10 10s. Blasting Powder, Wire, Fuzees, &c. Models for Patents of Inventions. Technical information on all Scientific questions. Instruments of every Description made to order. General Export business in all British manufactures. Orders from the Country or Abroad to be accompanied by a Remittance. (3) THE LONDON SPECTROSCOPE COMPANY. CHARLES OWEN, Manager. WHOLESALE MANUFACTURERS OF EVERY DESCRIPTION OF SPECTROSCOPES, AND Mathematical, Philosophical, Nautical, Astronomical and Optical Instruments, TO HER MAJESTY'S GOVERNMENT, &c. 46 & 48, CITY ROAD, E.C. The above Company beg to intimate to the scientific world that they have, at a great expense, secured the valuable services of MR. CHARLES OWEN, and have appointed him their sole and exclusive Manager. Having placed at his command abundant capital, together with extensive and commodious premises replete with all the latest improvements and appliances appertaining to the trade, they are now prepared to RECEIVE ORDERS, and execute them with the utmost promptitude and despatch. The success which distinguished Mr. Owen's productions while connected with the well-known firm of Browning & Co. is in itself a guarantee that all instruments issued by this Company will bear the mark of originality of design, excellence of workmanship, and accuracy of adjustment. In returning their warmest thanks for the liberal patronage already accorded, and for the many promises of support daily received, the Directors beg to assure those gentlemen who may favour them with their commands that no effort will be spared to secure and retain their fullest confidence and recommendation. (4) |