102 ALS. Kimball— Magnetic Strains in Fron. 
mined by an electric bell, but the probable error of setting the 
screw being greater than one division of the screw head, a more 
exact method was sought. The following device was finally 
hit upon, which gave results which may be trusted to one-half 
divisions. The iron bar, micrometer screw, and a telephone 
were put in the circuit of a very weak Leclanche cell. 
When the screw was turned up to loose contact with the bar, the 
familiar boiling sound of a too sensitive microphone was 
heard, which ceased the instant firm contact was made. The 
lowing table gives the results obtained in one series. Complete 
Column A, in the table gives the number of the experiment; 
B, the weight on the bar; C, total deflection after the weight is 
put on; D, increase of weight; E, increase of deflection due to 
I of wei i 
deflection with the second, third, etc., currents after a change in 
load ; J=I—H. 
TABLE IT. 
A.| B O° Dy) Bey F-G4 EL PEL a AS! B © |D.| B. | FAG./H) Ld 
] e ye ite Sebatt 2h Ae | eet Bee 734 fh as ae ~ - 
2 fl d g a Bes Rey Bee Se wei Se 99) + “ “ ee 59 pe ee ee 
3 5 5 S z 86 ewe, Bieta ae 23 a“ a te “ 724 Pat e 
4| 8 & a Sh 4884 1-8 be “ ib te ‘ r . 1134 44 
5} 8 # = iE 86 |-- |-- |-= |-=] 25) 308) 652 | 8f| 171 Biel ii, 
7| 58 | 140 | 5] 140\26 |._ |. |. |-lPan} «| #& |} « las |. Giles 
gi « “ 7 19;) Wee to eRe rT} “ ‘ oe 284 fie? 164 ee 
; ¢ “ac “ ““ “a bites ee en Seer cc ‘ we {4 ee 
lol“ “ a1 Te. | Wc ae “ “ . |283|.. 164 14 
M1 : . : z <p ie eats = 4 * 384 one . 168 |13 31} ihc ney 
L 2 ‘ + L 2 Neh 4 PS ‘ igs ar 
3| 14 | 3073 | 82/ 167 |[953|_- ciel ee ee Bet, A 
: “ 6c ‘ 86 94 34) ‘ b jae ee 974 174 ies 
7] had be oe “c 974 ne ms oo 35) “ “s “ 44 we s 
; “ “ ti po (86.1. ap. sel “ “ “ ee 17 |1¢ 
De es ee eas . |..|} 37|46¢| 991 | 82/172 [85g1__ |. |-- |-- 
] ‘ “ / 114 38 ‘“c “ “cc mare 66 194) -- ee 
19] 22 | 408 7 8 ESET a ae) a ee. to eS fee 
9 “ “ uy 4). 16648 4. 4 ae Se yee 166 |. ek ie 
