100 ELEMENTARY PHOTO-MICROGRAPHY. 



PRICES OF MICROSCOPE OBJECTIVES AND 

 ACCESSORIES. 



2in. and lin. objective . . . . . . each 2o/- 



iin. and Jin. objective . . . . . . ,, 257- 



|in. objective . . . . . . . . . . . . 3O/- 



i^in. oil-immersion objective . . . . . . 5 o o 



Eyepieces A, B, C . . . . . . each 10/6 



Projection eyepiece . . . . . . . . . 4O/- 



Parabolic side silver reflector . . . . . . 237- 



Vertical illuminator .'. .. .. .. .. 10/6 



Davis shutter . . . . . . . . . . . . I5/- 



Bull's-eye . . . . . . . . . . . . I5/- 



Camera-lucida 6/- 



Focussing glass . . . . . . . . . . 5/- 



Adjustable oil lamp, with metal chimney . . . . 257- 



Ditto, combined with bull's-eye . . . . ..^440 



Incandescent gas lamp . . . . . . . . io/- 



Stage micrometer, i- looin. and i- loooin. .. .. 5/- 



Eyepiece micrometer . . . . . . . . . . 5/- 



Polariscope . . . . . . . . . . . . 257- 



Selenite plates .. .. .. .. each 1/6 



Substage condenser, chromatic . . . . . . 357- 



Ditto, achromatic . . . . . . . . . . 75/- 



Iris diaphragm . . . . . . . . . . 25/- 



Magnesium clockwork lamp . . . . . . . . 2O/- 



Magnesium ribbon .. .. .. . .per oz. 1/6 



Acetylene generator and lamp . . . . ..220 



Quarter-plate camera (4^x 3^), without lens . . 2O/- 



Limelight jet, regulator and gauge, tubing, and 



oxygen cylinder . . . . . . . . . . 9/- 



