concave mirror ; two eye-pieces ; 1 in. and J in. objec- 

 tives; horizontal mahogany case with recessed brass 

 handle. 



Exhibited by C.' Baker. 1873. Price 51. 10s. 



21. Mir oscope [" College "], with tripod stand ; short 

 tube with draw- tube, inclinable ; coarse adjustment by 

 sliding tube ; fine adjustment by micrometer screw ; 

 plain glass stage ; revolving diaphragm ; plane and con- 

 cave mirror ; eye -piece ; two objectives ; mahogany up- 

 right case with drawer. 



Exhibited by Jas. Swift fy Son. 1880. Price 51. 5s. 



22. Microscope [" Students ""], with horse-shoe stand; 

 long tube, inclinable ; coarse adjustment by rack and 

 pinion ; fine adjustment by micrometer screw ; stage with 

 sliding object-carrier ; revolving diaphragm ; single con- 

 cave mirror ; one eye-piece ; one objective, which can 

 be used for three powers (1 in., \ in., \ in.) ; condenser 

 on separate stand ; stage and hand forceps ; live box ; 

 upright mahogany case with drawer. 



Exhibited by T. Armstrong if Pro. 1885. Price 31. 5s. 



23. Microscope with horse-shoe stand ; tube of medium 

 length ; inclinable body ; coarse adjustment by sliding 

 tube ; fine adjustment by micrometer screw ; objec- 

 tives sliding into the tube ; simple stage ; cylinder 

 diaphragms ; two eye-pieces ; two objectives ; mahogany 

 case of Hartnack's pattern. 



Exhibited by P. Harris $ Co. 1888. Price 61. 10*. 



24. Microscope [" English medical "], with bronzed 

 horse-shoe stand ; short inclinable tube ; draw tube ; 

 coarse adjustment by sliding tube ; fine adjustment by 

 micrometer screw ; plain black stage with spring clips ; 

 cylinder diaphragms ; plane and concave mirror ; one 

 eye-piece ; no objectives shown ; sliding adapters for 

 rapid, changing ; horizontal mahogany case with leather 

 handle. 



Exhibited by J. Parkes fy Son. 1882. Price (complete) 61. 



25. Microscope [" Histological"~\, on bronzed horse- 

 shoe stand, with short tube, inclinable ; coarse adjust- 

 ment by sliding tube ; fine adjustment by micrometer 

 screw ; plain stage with steel clips ; cylinder diaphragms ; 



