Page:Proceedings of the Royal Society of London Vol 60.djvu/315

Rh Observations on Magnetic P ermeability of Liquid Oxygen. Throws of Ballistic Galvanometer. Induction Coils balanced.

Exp. I. 4 '0 mm. to left 4 "2 ,, >> } The transformer in liquid oxygen. Primary current = 3 7 * 8 amperes reversed L 4 '3 „ i) J through primary coils. The transformer lifted out of liquid oxygen i 17 '0 mm. to right 1 into cold gaseous oxygen at the same temExp. II. 17-5 „ \ perature. i 18*5 „ Primary current = 37 ’8 amperes reversed l j through primary coils. Exp. III. -1 3*2 mm. to left 2 ‘5 ,, )> j The transformer in liquid oxygen. Primary current = 37 *2 amperes reversed l r 2-8 „ J ] through primary coils. The transformer lifted out of liquid oxygen 20 '0 mm. to right 1 into cold gaseous oxygen at the same temExp. IV. 21 -0 „ \ perature. 1 1 21-3 „ | Primary current = 36 *8 amperes reversed l J through primary coils. Throws of Ballistic Galvanometer in Standardising Observations. Primary Coil of Balancing Coil disconnected. Exp. Y. 24 *0 mm. to right 1 25 -0 „ 9 9 25-0 „ 99 24-5 „ J> 25 -0 „ 9 ) J Corresponding to 0 *1145 ampere reversed through primary coil of the transformer, the transformer being in liquid oxygen. The mean of these ballistic throws is the quantity denoted by d, and the current 0 T145 ampere is the a in the formula above. Standardising Observations repeated with another Current. Exp. YI. 58*0 mm. to right 58 *0 „ "i Corresponding to 0 *2639 ampere reversed > through primary coil of transformer, the J transformer being in liquid oxygen. Throius of Ballistic Galvanometer. Induction Coils balanced. r Exp. V II. I Exp. V III. Exp. IX { 4 '0 mm. to right 4 -0 „ 0 ’4 mm. to left 0 -4 „ 0-2 „ 4 • 5 mm. to left 4'8 „ 4-2 .. 1

The transformer lifted out of liquid oxygen into cold gaseous oxygen at same temperature. Primary current = 8*037 amperes reversed through primary coils. The transformer in liquid oxygen. • Current = 8 *095 amperes reversed through primary coils. The transformer in liquid oxygen. Current = 28*8 amperes through primary coils.