VI PREFACE. 



by him, in order that those desirous of obtaining appa- 

 ratus, and not having an opportunity of personal 

 examination, may yet be able to judge of the style, 

 quality, and price. The usual brevity of the descrip- 

 tions has in a few instances been departed from, where 

 the instrument has demanded a more extended notice. 



Particular pains have been taken, and a large ex- 

 pense incurred, in the illustrations (numbering over 750) 

 of this Catalogue ; they are mostly original, and drawn 

 from the most modern and approved instruments. 



These articles embrace every variety kept in an 

 extensive Optical and Philosophical Instrument Store ; 

 and include almost every instrument used in natural 

 and experimental philosophy. 



The author having devoted himself from early youth 

 to the manufacture of these instruments on a some- 

 what extensive scale, is satisfied that his collection of 

 instruments is not surpassed, if equalled, by any in the 

 country, for extent, style, quality, or cheapness; he 

 therefore solicits with confidence a continuance of that 

 encouragement which he has in past years received, 

 and which he is determined to merit. 



Professors of the sciences will find in his establish- 

 ment a full assortment of instruments suitable for 

 illustration and practical purposes. To his stock have 

 been recently added many large and valuable instru- 

 ments, and it will be his endeavor to continue to keep 

 pace with the growing demand for good instruments 

 among the scientific community. 



Parents and guardians of youth, who feel desirous 

 of promoting a taste for Chemistry and Natural Phi- 

 losophy in the minds of the young, from seeing what 

 rapid advances these sciences are making, and how 

 necessary their acquaintance to all, will find nothing 



