MEASURE OF MAGNETIC DEFLEXIONS. 



57 



magnet-power, by the method of deflexions. First process, 

 the disturbing magnet applied broadside-on. 



Fig. 22. 



'G 



N 



In Figure 22 is represented a side view of the deflex- 

 ion-apparatus, and in Figures 23, 24, 25, horizontal plans 

 of it under different circumstances. E is a graduated 

 circle firmly fixed, preserving absolutely the same posi- 

 tion in Figures 23, 24, 25. jP is a bar turning horizon- 

 tally round the centre of E, and having pointers 

 or verniers f, f, for reading the graduations of E. 

 F supports all the rest of the apparatus. From F 

 there rise two uprights 6r, 6r, with a cross-bar at 

 the top, to which is attached a suspension-thread 



