LOWELL, 

 MASS. 



QHAS. S. BOURNE, 



MANUFACTURER OF 



LISSAJOUS FORKS 



(Illustrated on page oo) 



AND OTHER APPARATUS. FOR PROJECTION. 



for Circular. 



ESTABLISHED 1870. 



8. HAWKRIDGE, 



HOBOKEN, N. J., 



(Successor to 

 George Wale & Co.), 



PHILOSOPHICAL 

 INSTRUMENT MAKER 



At the Stevens Institute 

 of Technology. 



A W 'A RDS OF MERIT : 

 Silver Medal, American In- 

 stitute, 1875. 



Brenize Medal, A merican In- 

 stitute, 1875. 



Two Silver Medals, Cincin- 

 nati Exposition , 1 88 1 . 

 Magric Lanterns and Accessories. 

 Col ii-p- Lanterns and Attachments, 

 including Gas Microscope Po- 

 larisropo. An>:ir:mis for Total 

 Reflection, Mapnetic Spectra, 

 Spectrum Analysis. Tanks for 

 Solar Prominences and Decompo- 

 sition of Water. CtewnotropM, 

 1'risnis. Nicol's Prisms. Uouble- 

 Imape Prisms, Porte Luniieres. 

 Hcli(i>t!its, Spectrowopci'.Spcctro- 

 meters, and Gratinps. Wales 

 Workinp Microscopes and I'ni- 

 versal Lenses. Apparatus for 

 Blowpipe Analysis. Apparatus for 

 illustration of Prof. A. M. Mayer's 

 Scientific Series. Mafrnesium 

 Ribbon. Powder and Lamps. Alu- 

 minum and Platinum. 



Catalogues gent on application. 



