
@ That the Empire State has a department devoted to 
visual instruction is conclusive evidence of the importance of 
projection apparatus in the modern educational system. 
@ Our Model C is simple in construction, easily operated 
and sells for the moderate price of $35.00, which places it 
within the reach of practically every school. 
@ It is made so that at any later time attachments for 
opaque and microscope projection can be added. Thus 
equipped it is an admirable all around projection lantern, 
amply meeting the needs of class room work. 
@ Send for Catalog D-g for full description. Correspond- 
ence invited. 
IRN Our Name on a Photographic Lens, 
(G2: Microscope, Field Glass, Laboratory Ap- 
Po, ~ 
its, Engines nh follier <Sdlcke a — : 7 
ter Ecanile pia ies ei atl eee Ailey Candies of Rare Quality 
Bausch 6 jomb Optical ©. Sold by Sales Agents everywhere and at 43 
WEY roe on DOCHESTER NY, TRANKFORT Ailes 55 Retail. Shops in«Pringipal Cities — 


Refracting and Reflecting — 
Astronomical Telescopes 
Standard and Portables 

Visual and Photographic 
OBJECTIVES 
Computed by our associate 
DR. F. R. MOULTON 
(Chicago University) 
OBSERVATORIES — 
Specula, Planes, Eyepieces, etc. 
Photographs and Circulars on request — 
LOHMANN BROS. 
Illustration shows 5-in. with pneumatic clock. GREENVILLE, OHIO :: 2: (U.S. Ae : 

