JAMES GREEN, 
MANUFACTURER AND IMPORTER OF 
Philosophical and Chemical Apparatus, Optical and 
& Mathematical Instruments, 
No. 422 Brosapway, 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 re- 
search, on very favorable terms. 
Special attention will still be given to making Standard Ba- 
‘rometers and Thermometers, also, Portable Barometers and Wol- 
Jaston’s Barometric Thermometers for measuring heights. 
_ Green’s Barometers aud Thermometers, as adapted for the sys- 
_ tem of meteorological observations conducted by the Smithsonian 
Institution, put up in spring boxes for safe transportation through- 
out the United States and foreign parts. 
Apparatus proper for experimental lectures on Natural Philoso- 
phy and Chemistry may be found on hand, together with School 
Apparatus, and a general assortment of Telescopes, Microscopes, 
' ic Lanterns with Astronomical and other slides, Theodolites, 
Levels, Surveying Compasses, Drawing Instruments, &c. 
Catalogues sent to address. 
May 1850. 3t 
To Collectors of British Shells and Fossils. 
ROBERT DAMON or Weymoutn, Dorset, Enevanp, 
Supplies collectors of the shells of the British Isles on the folloy- 
Ss terms: 
100 species averaging two or three of each, £2 12 6 
200 - - - - - 6 60 
300 : - - - 12120 
R. D. has also.an extensive collection of British Fossils on 
ually reasonable terms. 
Reference in the United States permitted to Mr. Henry Wheat- 
land, Salem, Mass. 
Weymouth, April, 1850. : [Steon] 
