99_A_. KOCH’S EXPERIMENT. THE LOSS OF ELECTRICITY FROM A GLOWING ELECTRIFIED BODY. _Wied. Ann._, XXXIII., p. 454, ’88.
99_B_. SCHUSTER AND ANPENIUS’ EXPERIMENT. THE INFLUENCE OF LIGHT ON ELECTROSTATICALLY CHARGED BODIES. _Proc. R. So._, Lon., LXII., p. 371, ’87; _Proc. Swedish Acad._, LXIV., p. 405, ’87.—Many recent periodicals have set forth that ultra-violet light will discharge only negatively charged bodies. While this is practically or sometimes the case, yet these experimenters found that a positive charge was dissipated very slowly. They confirmed the results that the ultra-violet rays played the principle part in the removal of a negative charge. Polishing the surface accelerated the action. § 99, near beginning.
99_C_. RIGHI’S EXPERIMENT. SOME NEW ELECTRIC PHENOMENA PRODUCED BY LIGHT. Note 2-4, _Rend. R. Acad. die Lincei_, May 6, 20, and June 3, ’88.
99_D_. RIGHI’S EXPERIMENT. SOME NEW ELECTRIC PHENOMENA PRODUCED BY ILLUMINATION. _Rend. R. Acad. die Lincei._ VI., p. 135, 187, ’88.—Confirmation of the results of other physicists, and a quantitative measurement determining that the E. M. F. between copper and selenium was increased 25 per cent. by illumination by an arc light. The selenium was in the form of crystals mounted upon a metal plate.
99_E_. STOLSTOW’S EXPERIMENT. ACTINO-CURRENT THROUGH AIR. _C. R._, CVI., pp. 1593 to 95, ’88.—Liquids tested. Greatest absorbents of active rays most quickly discharged.
99_F_. RIGHI AND STOLSTOW’S EXPERIMENTS. KIND OF ELECTRIC CURRENT PRODUCED BY ULTRA-VIOLET RAYS. _C. R._, CVI, pp. 1149 to 52, ’88.—The discharge was accelerated by using a chemically clean surface. The burning of metals, for example, aluminum, zinc or lead in the arc light increased the discharging power.
99_G_. BICHAT & BLONDOT’S EXPERIMENT. ACTION OF ULTRA-VIOLET RAYS ON THE PASSAGE OF ELECTRICITY OF LOW TENSION THROUGH AIR. _Comptes Rendus._ CVI, pp. 1,349 to 51. ’88.—They employed arc lamps whose carbons had aluminum cores.
99_H_. NACARRI’S EXPERIMENT. THE DISSIPATION OF ELECTRICITY THROUGH THE ACTION OF PHOSPHOROUS AND THE ELECTRIC SPARK. _Atti di Torino._ XXV, pp. 252 to 257. ’90.—The loss of charge was eighteen times less rapid in the dark through the air in a bottle, than when a piece of luminous phosphorous was placed in the bottle. The introduction of turpentine, which checked the glowing of the phosphorous, retarded the loss of charge.