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433 MANUFACTURER of Patented Induction Coils, other Scientific Instruments and Engineering Appliances
to the Government Departments. JOINTLESS SECTION COILS, my system of 1868, to order, ro in. Coils
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Maker and Designer of the following Coils :POLYTECHNIC, 29 in. spark. SPOTTISWOODE, 44 in. spark. THE SOUTH KENSINGTON COIL, 48 in. spark. Special Coils for
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any Induction Coil), £6 6s. HOSPITAL X-RAY SETS, complete in every detail, from £25 each. The Model Apparatus adopted for South Africa, with Batteries, small
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(PATENT). Shows a magnificent display of scintillations showers of sparks, direct from the mineral Pitch blende, Radium, Polonium, Uranium, Thorium, or asy radio-active substance, even a Welsbach mantle con tains sufficient Thorium to excite the very sensitive screen of the Scintilloscope, which is far more sens tive than the Spinthariscope. The Scintilloscope rivals the most delicate Electroscope as a detectar of Alpba rays.
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of these marvellous substances which are pro ducing the terrific bombardment causing this beautiful display.
See NATURE, September 29, page 535.
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