298 Manual of Chemistry . [No. 124. 



Madras, had compiled notes for a similar purpose ; his death having 

 unfortunately prevented a revision of his first valuable, though crude, 

 little publication, I have therefore made use of his able abstract of 

 Rose's work, with such corrections and alterations as I considered neces- 

 sary, and it has been necessary to rewrite nearly the whole. 



It was not my intention ever, with my present experience, to have 

 so soon undertaken the authorship of a compilation upon the subject; 

 but having been applied to by the Rev. Mr. Garrett, of the Wesleyan 

 Mission, for a work adapted for the Natives of this country, who might 

 be anxious to acquire an elementary knowledge of chemical science, 

 and finding that Dr. O'Shaughnessy's excellent little Manual was out of 

 print, and there being no work printed in England, at all adapted for 

 the perusal of Natives, I have determined on commencing at once the 

 preparation of a work adapted for the purpose. 



As the labour and time required for writing a complete work of this 

 kind would be greater than my pursuits and official occupations would 

 enable me to spare for the purpose, Mr. Garrett has agreed to share 

 with me the labour of compilation, and he has therefore undertaken to 

 draw up the part descriptive of the chemical elementary substances. 



While so many excellent treatises upon the different branches of 

 Chemistry exist, no originality can be expected in a work of this kind, 

 and it must be therefore regarded, merely as a compilation of the in- 

 formation from other works, abstracted, condensed, and made as practi- 

 cal as possible. 



In endeavouring to lead the Native student on to a general view of 

 the useful application of Chemistry, it has not been forgotten, that the 

 subject may combine with that brief and assorted information which 

 renders the work a " Manual of Chemistry," which will be useful, as 

 it is hoped, to those gentlemen in India, who possessing an elementary 

 education upon the first principles of Chemistry, are yet deterred from 

 the practical uses of the science, by the remembrance of the extensive 

 and costly apparatus which they have seen used by their instructors in 

 Europe. 



The Native medical practitioner will find a knowledge of this sci- 

 ence of the utmost value in assisting him in arriving at a knowledge 

 of the composition of the various mineral productions which the coun- 

 try affords, so as to enable him to ascertain what may be useful to him, 



