TO 



THE STUDENTS 



OF 



MEDICINE AND CHEMISTRY 



IN THE 



UNIVERSITY OF GLASGOW. 



GENTLEMEN, 



A CONSIDERABLE portion of the work 

 which I now offer to the public, is already known to such 

 of you as attended my course of lectures during the last 

 three or four sessions. For I was in the habit of exhibit- 

 ing to you a table of the atomic weights of the different 

 bodies, as I succeeded in determining them, and of stating 

 to you the experiments by means of which the results 

 had been attained. I observed with pleasure the interest 

 which the better informed and more intelligent students 

 took in these investigations while the numerous ap- 

 plications from various quarters for copies of my atomic 

 tables, satisfied me that many of my students had un- 

 derstood the discussions, and had fully appreciated their 

 importance. 



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