. Induction coils : how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and practical information on primary and secondary battery . Fig. 47. Fig. 45 shows a solution tube to be filledwith solution of sulphate of quinine, etc. Fig. 46 shows three exhausted tubes ar-ranged in series. Currents in l^aciio. 151 A is of uranium glass, and glows darkgreen ; B of English glass, showing a bluehue, and C oi soft German glass, glowingwith a bright apple-green tint. Crystals of nitrateof calcium, nitrateof silver, benzoicacid, tungst
. Induction coils : how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and practical information on primary and secondary battery . Fig. 47. Fig. 45 shows a solution tube to be filledwith solution of sulphate of quinine, etc. Fig. 46 shows three exhausted tubes ar-ranged in series. Currents in l^aciio. 151 A is of uranium glass, and glows darkgreen ; B of English glass, showing a bluehue, and C oi soft German glass, glowingwith a bright apple-green tint. Crystals of nitrateof calcium, nitrateof silver, benzoicacid, tungstate ofcalcium, lithia ben-zoate, sodium salicy-late, zinc sulphide,and acetate of zincfluoresce. Fig. 47 is a highlyexhausted tube, hav-ing at its lowest parta few pieces of the secondarycurrent is turned onat /and A^the rubiesshine with a brilliant rich red, as if theywere glowing hot. Fig. 48 shows the tube to exhibit the. Fig. 152 Currents in Vacuo, effect resulting from focussing the electricrays on a piece of iridio-platinum at B. The cup A forms the negative pole ; themetal disk C, the positive. On increasing the intensity of the spark,the metal at B glows with extreme brill-iancy, and melts if the intensity be carriedtoo far. CHAPTER VIII. ROTATING EFFECTS. Although the luminous discharges inthe exhausted tubes are extremely beauti-ful, yet the effect is indescribably enhancedwhen the tubes are rotated. Gassiots starwas the name given to the earliest exhibitof a rotating tube carrying a luminous dis-charge, owing to the curious phenomenonensuing from the interruptions of the the human retina is only capable of re-taining an impression for a fraction of asecond, and as the tube is only momen-tarily luminous during the passage of thespark, the effect of the revolving tube isthat of a series of such arranged as theradii of a circle, the number apparent,being governed by the rapidity of rotati
Size: 1045px × 2390px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidinductioncoi, bookyear1901
