by a particular Case of Magnetic Action. 



329 



Distance. 



Values of P. 



Values of I. 



Distance. 



Values of P. 



Values of I. 



in. 



s. . 



s. 



in. 



s. 



s. 



0-05 



4-07 



1-83 



0-50 



1-49 



0-24 



0075 



3-425 



1-245 



60 



1-285 



0185 



010 



311 



0-99 



070 



1-11 



014 



0-125 



2-885 



0-825 



0-80 



0-96 



Oil 



015 



2-715 



0715 



090 



0-835 



0-095 



0-175 



2-575 



0-635 



100 



0-72 



0-08 



0-20 



2-455 



0-575 



1-20 



054 



0-05 



0-25 



2-245 



0-485 



1-40 



0-41 



003 



0-30 



2055 



0-415 



1-60 



0315 



0025 



0-35 



1-88 



036 



1-80 



0-255 



0-015 



0-40 



1-735 



0-315 



200 



0-21 



001 



0-45 



1-60 



0-27 









It will be noticed in the above Table how rapidly the values 

 of I diminish for increase of distance as compared with the values 

 of P, the inductive action becoming much sooner comparatively 

 insignificant. And the ratio of change as regards distance varies 

 considerably, as will be seen by the following numbers selected 

 from the Table last given : — 



)istance. 



in. 



P. 



s. 



I. 



8. 



005 . . 



. . 4-07 



1-83 



0-10 . . 



. . 3-11 



0-99 



0-20 . . 



. . 2-455 



0-575 



0-40 . . 



. . 1-735 



0-315 



0-80 . . 



. . 0-96 



0-11 



1-60 . . 



. . 0-315 



0-025 



The general character of the variations is so much more 

 strikingly seen when the results are thrown into the shape of 

 curves, that it seemed desirable to add the following diagram : — 



Distance between ends of magnets. 





in. 



o-o 



ir 

 



•5 



in 

 1 



•o 



in 

 1 



5 



m. 

 2- 



s. 

 5 











\ V 













\ \ 









6 



s 















^ 



^^ 









"T — — -J 







j - — i ^ — 



1 



^^^<^- 



^"' 



1 





/' 





j 





1 



\ 



1 





i 



! i 



