Referee report by G. C. Foster on 'The Mechanism of the Electric Arc' by H. M. Ayrton

                                of latent heat applies to the evaporation of carbon in the arc, 
and no reason is given why it should not, the rate of evaporation 
must be simply proportional to the supply of heat. This consideration 
seems to diminish the value of the <u>a priori<\u> derivation given in 
pp. 12 and 13 of a formula otherwise obtained as the result of experiment. 
The following seem to be merely clerical oversights - 
Page 13, line 1 - The symbol "l" is introduced without explanation: 
one has to find out from the context that it means the length of the arc. 
Page 27, line 10 from bottom. - "C F, say, (Fig. 7)": there is no F in 
Fig. 7 
Page 27, last line. - "BC, CG (Fig. 5)". Should this be <s>"<\s>BC, CD 
(Fig. 7)? 
Pages 29, 30. - There are no reference letters on Fig. 10. 
Page 39. - In (1) for "is altered", read "is not altered"? 
Page 41. - For "Table III." read Table IV? 
Page 44, line 8. - For "Fig. 11" read Fig. 12? 
-, lower. - References to Fig. 14 do not agree. 
Page 61. - Where is Fig. 20? 
G. Carey Foster 
16th July, 1901.