ON THE WORD " CHEMIA " OR " CHEMISTRY/^ 101 



exclusion^ we imply that it is the same thing which is 

 excluded. 



The foregoing logical equations will be equally true if 

 we interpret N to mean '' not related to, either as cause 

 or as effect/^ or " out of relation with/^ 



I believe I have in this paper shown an unexpectedly 

 direct transition from the common logic to the logic of 

 relatives. 



XIV. The Word " Chemia " or " Chemistry. 

 By R. Angus Smith, Ph.D., F.R.S., &c. 



Bead March 23rd, 1880. 



The meaning of the word ^' chemistry^ 'has been discussed by 

 several writers recently, as well as by many in early times. 

 The observations made by Professor Schorlemmer and the 

 paper by Mr. Mactear (one at the Literary and Philosophical 

 Society of Manchester, and the other in Glasgow) have 

 caused me to return to the subject, which I had at various 

 times thought of. I have always considered the book of 

 Borrichius ' De Ortu et Progressu Chemiae' (on the rise and 

 progress of chemistry) to have given the right direction of 

 thought ; and the Greek manuscripts on the subject, at least 

 on the sacred art, point so strongly to Egypt by the use of 

 the words Isis aud Osiris as symbols of their mysteries 

 that there seemed little room for doubt. 



I shall begin as if all my readers were acquainted with 

 the history from the 4th or 5th century according to the 



