256 



Mendenhall and Waidner- 



magnets were then magnetized in the uniform field of a small 

 electromagnet and vibrated in an exhausted receiver placed 

 at a point where the horizontal intensity of the earth's field 

 had previously been determined. The slight controlling 

 moment of the silk suspension was determined from the time 

 of oscillation of the brass disc without any magnets on it, and 

 allowed for in all the experiments. The results of these 

 experiments are given in the following tables. These magnets 

 were mounted on the face of the disc, side by side, so that 

 they occupied the same relative positions that they would in a 

 galvanometer system. 



.11 



.I s 



a 



u 

 & 



g 

 | 



C 



6 



S 



2 



g 



EH 



g & 

 > 



1 



O So 



•" c 

 •5 bjo 

 bflcfl 



c/5 

 bjO e 



Si* 



,. « bx 



bjj^ U 



-a* 



"c ■ 



<2 



H, 



Fine 

 Watch 



5-30 



0-170 



0-061 



0-000055 



0-00043 



3400 



0-02580 



469 



H, 



ii 



4-15 



0-172 



0-060 



0-000043 



0-000337 



a 



0-0184 



422 



H, 



it 



3-16 



0-174 



0-059 



0-000032 



0-000251 



" 



0-0122 



382 



u, 



a 



1-95 



0-175 



0-058 



0-0000197 



0-000155 



a 



0-00485 



246 



H„ 



a 



1-24 



0-175 



0-059 



0*0000128 



o-oooioo 



a 



0-00215 



168 



H 6 



a 



1-02 



0-173 



0-059 



0-0000103 



0-000081 



a 



0-00143 



139 



H, 



a 



0-650 



0-170 



0-061 



0-0000067 



0-000053 



a 



0-000542 



81 



G, 



a 



3'00 



0-197 



0-050 



0-0000295 



0-000232 



a 



o-ono 



372 



a, 



a 



1-81 



0-197 



0'050 



0-0000178 



0-000140 



a 



0-00405 



228 



g 3 



a 



0-98 



0-210 



0-050 



00000103 



0-000081 



a 



0-00130 



127 



i, 



J. and C. 

 Spec. Mag. 



1-12 



0-252 



0-050 



0-0000141 



0-000111 



a 



0-00252 



179 



i* 



it 



1-15 



0-161 



0-052 



0-0000096 



0-000076 



a 



0-00193 



201 



B, 



a 



4-12 



089 



0-120 



0-00044 



0-00345 



2200 



0-1251 



284 



it 















5200 



0-1248 



283 



B, 



a 



1-53 



0-79 



0-126 



0-000152 



0-00119 



800 



0-0102 



67 



ii 















1300 



0-0107 



70-5 



it 















3400 



0-0107 



70-5 



B, 





1-09 



0-74 



0-125 



o-oooioi 



0-00079 



a 



0-0052 



51 



A, 



Watch 



Spring 



3-35 



0-52 



0-115 



0-000200 



0-00157 



3400 



0-0407 



202 



A. 



it 



2-29 



0-51 



0-115 



0*000135 



0-00105 



tt 



0-0198 



144 



A, 



a 



1-67 



0-52 



0-115 



o-oooioo 



0*00078 



a 



o-oioo 



99 



A, 



a 



0-80 



0-50 



0-115 



0-000046 



0-000361 



a 



0-0031 



67 



A, 



a 



1-53 



0-254 



0-114 



0-000044 



0-000345 



a 



0-0049 



111 



C, 



Boker's 

 Music 

 Wire 



3*13 



D= | 0-22 0-000119 



0-00094 



a 



0-0211 



177 



c, 



1-14 



D= 0-22 



0-000043 



0-00034 



a 



0-0024 



55 



J, 



Extra 

 fine 

 Steel 



2-20 



T>= 0-078 



0-0000105 



0-000082 



a 



0-00284 



270 



K 



1-21 



D= ' 0-069 



0-0000045 



0-000035 



tt 



0-00076 



168 



