JAMES GREEN, 
MANUFACTURER AND IMPORTER OF 
Philosophical and Chemical Apparatus, Optical and 
_ Mathematical Instruments, 
No. 422 Broapway, New York. 
J.G. desires to inform the public that he has removed his es- 
tablishment from Baltimore to New York, where he believes that 
the greater facilities afforded for manufacturing apparatus, will 
enable him to fill the orders of his friends with increased satis- 
faction and greater promptness. 
In addition to the articles of his own make, his personal ac-. 
quaintance with the principal makers of Europe, enables him to 
supply every description of apparatus, for demonstration or Te- 
search, on very favorable terms. 
“Special attention will still be given to making Standard Ba- 
..rometers and Thermometers, also, Portable Barometers and Wol- 
~~ laston’s Barometric Thermometers for measuring heights. 
“~~ Green’s Barometers and Thermometers, as adapted for the sys- 
a! the Smithsonian 
E 
_ Levels, Surveying ‘om passes, Drawing Instruments, &e. 
_* Catalogues sent to address. ee 
ae y 1850. : 
A inches: apertiire, « 
3 3 4 : be . Se * 
ars, all conveniently and subs 
