50 Proceedings of the Royal Society of Victoria. 



II. That the sum x\-\-x'.2. of the coefficients due to the 

 leakage lines crossing the windows is inversely proportional to 

 the product of the numbers of sections in the two coils. 



(/). If 1l)=D be the breadth, and 2b' the height of the 

 window, 2/3, 2^' the section of the iron tongue as before, ^i 

 and q.2 the space factors of the coils; and /a the permeability of 

 the iron ; the formulae in {d) can be put in the following forms 

 suitable for calculation. 



^'C^ + ^' + iS) q, + q, ^' 





Ji, 1- 



±1 



where the upper signs are to be taken when the two extreme 

 sections belong to coil 2 (the even coil), of / sections, to which 

 the middle section belongs, and the lower signs, when the 

 extreme sections belong to coil 1. 



Evidently /=F 1 is the number of sections of coil 1 . 



48. When we make the same assumption as is made in §45 with 

 regard to the paths taken by the leakage lines that do not cross 

 the windows, we can obtain the values of the coefficients x"i, x'.^ 

 due to these lines in the general case of interleaved windings. 



Specifying the coils, sections, and dimensions of the trans- 

 former exactly as in the preceding paragraph, and letting 



B = 2l3+'^D=2fS+7rb (see §47/). 

 _2I) _2D 



we find, after proceeding as in §§ 45, 47, that 



32Br 11 1 Aa X./, 1 + 2X., 



n=i—l 



^U ^7 ) + 2tj j ^'^"2A,+«(l+v,)-l 



