ON THE GENETIC VIEW OF NATURE. 283 



The speculations of Wright had been purely geometrical. 

 He had drawn attention to the apparent unity of organ- 

 isation in the stellar system, as established by the ac- 

 cumulation of stars in a certain belt, popularly called 

 " the milky way." He also suggested that the whole 

 system was moving in a certain direction. Kant pointed 

 out the analogy with the solar system, in which, viewed 

 from the centre, the planetary masses would likewise 

 appear situated in a narrow belt, moving all in the same 

 direction. From these data he proceeds to show how, 

 taking for granted an initial movement and the action of 

 gravitation, the formation of rings, like those of Saturn, 

 can be explained ; further, how these might be broken 

 up and concentrated in satellites. In fact, he recognised 

 how, under the influence of gravitation, the solar system 

 might have been gradually formed out of matter which 

 was previously scattered through the whole of that space 

 which the system still occupies. Kant also descended 

 somewhat further into detail, and proceeded to discuss the 

 possible retardation of the earth's rotation through tidal 

 friction. 1 



1 The tract in which Kant de- ' publications. At the end of this 

 velops his views on this subject was ! tract he announces his ' Cosmo- 

 occasioned by a prize offered by the gonie,' which appeared the follow- 

 Berlin Academy in 17 54 for an answer j ing year with the title 'Natural 

 to the question whether the time of j History of the Heavens,' &c. Kant 

 revolution of the earth had suffered had the satisfaction of seeing many 



any retardation, and if so, through 

 what causes ? Kant did not com- 

 pete for the prize, deeming his re- 

 flections not capable of being suffi- 

 ciently perfected to deserve to be 



of his speculations verified by the 

 subsequent discoveries of induc- 

 tive research, notably through Sir 

 William Herschel's observations of 

 nebulae ; and the German edition of 



submitted. So he simply published Herschel's great memoir ' On the 



them in a local Konigsberg paper, 

 from which they were later re- 



Construction of the Heavens' (' Phil. 

 Trans.,' 1784), which appeared in 



printed in the collected works, j Konigsberg in 1791, by Sornmer, 

 forming one of the first of Kant's contains an extract from Kant's 



