530 Transmission of Power by Dynamo-electrical Machines. 



may be made with our equations, by selecting any two of the 

 five magnitudes and determining the other three from them. 

 But we will content ourselves with the above instances of 

 calculations, which refer to two of the most important cases 

 which occur in practice. 



The results obtained by calculation are perhaps rather more 

 complicated than is desirable for practical use ; it may, how- 

 ever, be observed that the aim was to deduce the results from 

 the principal equations in such a manner that only higher 

 powers of the small magnitudes a and A are neglected. If 

 we are content with a less degree of accuracy, the calculations 

 and the form of their results may be simplified. Moreover, 

 when the results derived from the principal equations are once 

 known, it will not be difficult to form approximate formulae, 

 which give the results with sufficient accuracy for certain 

 practical purposes, and are more convenient for use. But I 

 will not here enter on such external transformations, as they 

 are outside the object of the present paper. 



Bonn, January 1884. 



47 



22 



49 



38 

 21 



50 



6 



51 



7 



54 



10 



55 



16 

 4 



58 



25, 



9) 



16 

 17 



18 



Errata in the Paper on the Theory of Dynamo-electrical Machines 

 (Phil. Mag., Jan. and Feb. 1884). 

 Page Line 



for magnets read machines 

 after coil add but may be at rest 

 after conductor add v 

 for positions read portions 

 for two branch circuits at rest read two collateral branch 



circuits 

 for branch read neighbouring 

 for the potential read these potentials 

 for E 2 read E L 



26, 28, 36, and 37, for numerator read denominator 

 for ones for the read quantities of 

 after work add T 

 for time T read unit of time 

 „ 8 for opposite read the same 



123 28 for the change .... we have read the component of the 

 original magnetic moment which falls in the altered 

 direction. The original magnetic moment is 

 for numerator read denominator 



for — 5_ . read -3L- 

 J h+i b+i 



delete external 



after in add (33) and 



8 for no read small 



or j read . 



l+ai \-\-oti 



for magnet read machine 



for acts read acting 



delete and 



for determine read introduce 



for i read z. 





126 



2 



128 



20 



w 



28 



130 



39 



131 



8 



?? 



40 



132 



22 



5» 



29 



» 



30 



133 



5 



j> 



25 



