B. MODERN MICROSCOPES. 



10. Microscope [" Society of Arts "], with horse-shoe 

 stand ; long, inclinable ; coarse adjustment by rack and 

 pinion; fine adjustment by micrometer screw; plain 

 brass stage ; revolving diaphragm ; plane and concave 

 mirror ; one eye-piece ; 1^ in., ^ in., and f in. objectives ; 

 condenser on separate stand ; stage forceps ; upright 

 mahogany case with drawer. 



Exhibited by R. Field fy Co. 1859. Price 31 3s. 



This microscope obtained a prize offered by the Society of 

 Arts for the best microscope which could be supplied at the 

 price quoted, hence its name. It is interesting as being the 

 earliest cheap microscope of modern pattern. 



11. Microscope [" Student's "], with tripod stand; 

 long tube, inclinable ; coarse adjustment by rack and 

 pinion ; no fine adjustment ; round stage, revolving ; 

 revolving diaphragms ; plane and concave mirror ; one 

 eye-piece ; 1^ in. and J in. objectives ; stage condenser ; 

 mahogany case, with drawer. 



Exhibited by J. Parkes Son. 1869. Price 21. 



12. Microscope [" Student's "], with bronzed tripod 

 stand ; long tube, inclinable ; coarse adjustment by rack 

 and pinion; no fine adjustment; stage with sliding 

 bar to support objects ; concave mirror ; one eye-piece ; 

 J in. objective. 



Exhibited by Newton Co. 1869. Price (complete) 31. 3s. 



13. Microscope on tripod stand; tube of medium 

 length, inclinable ; coarse adjustment by sliding tube ; 

 fine adjustment by micrometer screw ; plain stage ; re- 

 volving diaphragm ; concave mirror ; two eye-pieces ; 

 f in. and ^ in. objectives. 



Exhibited by H. Crouch fy Co. 1889. Price 51 5s. 



14. Microscope [" Star "], with bronzed brass stand in 

 form of two triangles ; short tube, inclinable ; coarse 

 adjustment by sliding tube ; fine adjustment by micro- 

 meter screw ; plain stage with spring clips ; iris dia- 

 phragm ; plane and concave mirror ; one eye-piece ; 

 1 in. objective ; cloth covered case. 



Exhibited by R. $ J. Seek. 1891. Price 21. 2s. 



