28o 



POPULAR SCIENCE MONTHLY. 



brunt. The physicists hold that their 

 realm is governed by their laws, but 

 that the biological kingdom is a theoc- 

 racy. It appears that there is as 

 much or as little evidence for teleology 

 in an earth suited for life as in its 

 inhabitants, as much or as little evi- 

 dence for creative purpose in a crystal 

 or a solar system as in a sprig of 

 moss or a man. But perhaps such a 

 statement is in continuation of the 

 dogmatism, to which attention has 

 been called. . 



to two of the great scientific advances 

 of the last century, the atomic theory 

 and Joule's work on the mecha'nical 

 equivalent of heat. Manchester has an 

 ancient and active Literary and Phi- 

 losophical Society, which invited Pro- 

 fessor F. W. Clarke of the U. S. 

 Geological Survey, chairman of the 

 International Commission on Atomic 

 Weights, to give its Wilde lecture. He 

 reviewed the history of the atomic 

 theory from its first conception among 





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CELEBRATIO'NS IN HONOR OF 

 D ALTON AND LIEBIG. 



Theke have recently been celebrated 

 the centenary of Dalton's discovery of 

 the atomic theory and the hundredth 

 anniversary of Liebig's birth. The 

 ceremonies in honor of Dal ton were at 

 Manchester, a city which gave birth 



the Greeks to the present day and out- 

 lined the work still needed. Professor 

 J. H. van't Iloff, of Berlin, was pre- 

 sented with an address by the Owens 

 College Chemical Society, and laid the 

 cornerstone of the extension of tlie 

 chemical laboratory. The Wilde medal 

 of the Literary and Philosophical So- 



