JOHN STUART MILL. 3 2 7 



men and animals. "We slip into our boots a bellows-sole, which is con- 

 nected by a tube with a portable odograph. Each pace impresses on 

 the style a small movement, as does each turn of the wheel of a car- 

 riage ; and, if the paces be absolutely equal, we may measure with cer- 

 tainty the distances traveled. In walking on level ground we take 

 steps of astonishing regularity ; but, if the ground rises, the step gains 

 in length ; in descents, on the contrary, the steps are shortened. There 

 may result from this slight errors in the distances traversed. Not- 

 withstanding this, the employment of this apparatus will effect a great 

 progress ; it may be substituted with many advantages for the pedome- 

 ter, which gives at the end of a certain time only the paces accom- 

 plished, without taking count of the stoppages or the changes of rate. 

 In short, when we make an experiment on a measured road, if there 

 are produced variations in the length of the tracing represented by a 

 kilometre, we conclude therefrom variations in the length of the pace. 

 Such variations are observed under the influence of the slope of the 

 country, the nature of the soil, the boots we wear, the rate of walking, 

 or the weight carried. These studies in applied physiology have, I 

 believe, a great practical importance, and numerous applications to the 

 march of troops in a campaign. Nature. 







JOHN STUART MILL. 



By ALEXANDER BAIN, LL. D., 



PROFESSOR OF LOGIC IN THE UNIVERSITY OF ABERDEEN. 

 . II- 



HAYING no more documents until 1830, I propose to make a 

 short critical review of Mill's writings and doings in the inter- 

 val, upon the basis of the information supplied by himself. I will 

 first endeavor, for the sake of clearness, to extract the chronological 

 sequence of the years from 1820 to 1830, which, from his plan of writ- 

 ing, is not very easy to get hold of. 



1821. Returns from France (July). Beginning of psychological 

 studies. Condillac. 



1822. Reads the History of the French Revolution; inflamed 

 with the subject. Studies law with Austin. Dumont's Bentham ex- 

 cites him to a pitch of enthusiasm. Locke, Helvetius, Hartley, Berke- 

 ley, Hume, Reid, Dugald Stewart, Brown on Cause and Effect, Ben- 

 tham's Analysis of Natural Religion. Began intimacy with Grote. 

 Charles Austin. First published writings in the " Traveller " news- 

 paper. 



1823. Utilitarian Society at Bentham's house : Tooke, Ellis, and 

 Graham. Appointment to India House (May 21st). Letters to the 



