Radiography and the 'X' rays in practice and theory : with constructional manipulatory details / by S.R. Bottone ; with 47 illustrations.

Bottone, Selimo Romeo

Date:: 1898

Credit: Radiography and the 'X' rays in practice and theory : with constructional manipulatory details / by S.R. Bottone ; with 47 illustrations. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

41/212 page 27

$hammer 2] in.; si/e of iron head of hammer f in. diameter X J in. long. Base (fitted with false bottom to contain condenser), 18 in. long x 9 in. wide x 2.^ in. deep. Condenser, 144 sheets of tinfoil, size 12 in. x 6 in., interleaved with 144 sheets of paraffined paper, Bin. x 13 in. Dimensions of Parts for a C in. Spark Coil Iron bundle of No. 18 B.W.G. annealed iron wire, 1| in. diameter 15 in. long. Primary wire : four layers of No. 14 double silk-covered copper wire, about 5 lbs. Ebonite tube over primary, 14 in. long, 2.{ in. inside diameter, 2.^ in. outside diameter. Elionite heads, 6 in. square, ^ in. thick. Seven vulcanised fibre circlets, 5| in. diameter, ^ in. thick, with 2f in. central hole. Seven lbs. No. 36 double silk-covered copper wire. Platinum tip contact breaker, height from base to centre of hammer 3 in.; size of hammer head, 1 in. diameter, 1 in. long. Base (fitted with false bottom to contain condenser), 20 in. long x 10 in. wide x 3i in. deep. Condenser, 144 sheets of tinfoil, size 12 in. x 6 in., interleaved with 144 sheets of paraffined paper, Sin. x 13 in. § 15. In order to produce a successful coil, the greatest care is required in order to ensure perfect insulation. The pressure or ' tension' set up in the secondary ^Yire of these coils (amounting to no less than 150,000 volts in the 3 in. spark size, and to 300,000 in the 6 in. spark size) is so enormous that there is always a tendency for the current to leak off at some undesirable place; and if this once takes place, the evil rapidly increases, and the insulation of the coil breaks down. All$