8 Prof. Loomis on Electricity of Zinc buried in the earth. 
No. of Size of the Zine surface |: Deviation of (Tengen 
Experiment. Zine Plate. buried. meter. de viation, | 
40 12 inches by 12 288 square inches. 654° 2-194 
41 12 ‘4 6 144 ” 645 2097 
42 6 x 6 42 _ 634 1-984 
43 6 . 8 36 * 61 1861 
44 ee 3 18 “ 58! 1-648 
45 3 “ 2 12 i 57 1540 19 
46 $28 1 6 ¥ 534 1351 
47 2 x uf 4 7 524 1:292 
48 er 1 2 * 493 L171 
49 cena 4 1 “ 45 1:000 
50 Gate } 4 « 424 0-916 
51 4 ss 4 4 he 374 0°767 
52 4 > 4 $ 3 314 0615 
53 — 4 1s 264 0504 
54 oe t 35 ‘4 24 (445 
Exp. 55. In several of the last experiments the solder with | 
which the copper wire was attached to the zine plate covered a 
considerable portion of the zinc surface and impaired the effect of 
the plate. I therefore cut a strip one-tenth of an inch wide from: | 
thin sheet zinc and soldered it to the end of acopper wire. When — 
is was inserted two inches in the ground and connected writt 
Ne the bes dsr settled at 174°. 
i bers follow is exhibited by 
the abscissas represent the 
et 
0 ae 150 200 
numbers below the horizontal line represent the square inches of zinc surface b 
the dotted vertical lines represent the corresponding intensity of the electric current. 
