170 rilVSIoI.OCY OF MUSCLES AM) NKUV! -. 



and leave the body. If the body which is insert e.l is of 

 .-imple form, the separate lines of transmission mav easily 

 be calculated from the form; in bodies of invirular 

 shape this i> s-inieuhat hard to do, but even in such 

 cases it i.- pos-ihle to determine experimentally, not only 

 that the electricity distributes it>elf throughout the 

 b"dy, hut even the lint > along which the separate cur- 

 rents pass. 



Taking a simple example, for instance, a thick cyl- 

 indrical rod, in which the electricity passes in at the 



FIG. -10. DISTRIBUTION r THI. < IT.IIKXTS IN IKKI:<.I I.AI; IONM CI.IKS. 



surface <.f one end and out at theother.it is //////,// /',< 

 probable that the lilies -imply traverse the length of 

 the rod purallel to its ;i\is. \\'e may in imagination 

 repine.- tin- r-id hy a bundle of wires, each of which will 

 in this case be traversed by a portion of the whole 

 current, [f one of these wires is cut, and it- ends are 

 connected with the multiplier, it is evident that that 

 part of the current \\hich traver-es this \\ire mn>t 

 pass to the multiplier and cause a defleei i >u of the 

 needle. Jiut even if the wire is not cut. but is con- 



