536 



Microscopes and Auxiliary Apparatus. 



No. 54 402 - 



54402. 1 : 3. 



54407. 1:3,5. 



54409. 1:4. 



54.402. Medium Microscope, Stand III, Figure, not tiltable, with rectangular fixed stage, 

 coarse and fine tube focussing, millimetre graduation on draw tube, Abbe Illuminating 

 Apparatus, with iris diaphragm; Optical Outfit for 60 1000 diameters, together with box 



The coarse tube focussing is effected by rack and pinion, and the fine by micrometer screw. 

 The Optical Outfit comprises 2 achromatic objectives, 1 homogeneous oil-immersion objective, 1 triple 

 revolving nose-piece and 2 Huyghenian oculars. 



54.403. - - idem, with simple Illuminating Apparatus with iris diaphragm, and simpler 



Optical Outfit for 60730 diameters 



54.404. Medium Microscope, Stand IV, with rectangular fixed stage, coarse focussing by sliding 

 tube, fine focussing by micrometer screw, millimetre graduation on draw tube. Abbe 

 Illuminating Apparatus with iris diaphragm, Optical Outfit for 60 1000 diameters, 

 together with box 



The Optical Outfit consists of 2 achromatic objectives, 1 homogeneous oil-immersion objective, 

 and 2 Huyghenian oculars. 



54.405. idem, with simple Illuminating Apparatus, and simpler Optical Outfit, for 

 60 730 diameters 



54.406. - - idem, without Illuminating Apparatus, with concave and plane mirror, with 

 Optical Outfit for 70 575 diameters 



54.407. Laboratory Microscope, Stand V, Figure, focussing by fine rack and pinion motion, 

 largo, stage, draw tube, concave and plane mirror, with 2 achromatic objectives and 

 2 Huyghenian oculars, for 20 280 diameters 



54.408. - - i d o m, simpler, tube without extension, with triple objective, 2 Huyghenian 

 oculars, and box 



54.409. Crystallisation Microscope after Lehmann, for observing the physical behaviour of 

 preparations, specially of liquid and apparently live crystals, of. Fig. 54,409, with heating 

 and cooling device, for observations in direct ami polarised light, with simple Optical 

 Outfit with micrometer ocular and 2 objectives, with arrangement for testing the axial 

 emissions in converging light 



The Stand has two stages rotary about the optical axis. The lower one is concealed and has 



s. d. 



13. 10. 



10. 0.0 



12. 0.0 



9. 0.0 



5.15.0 



4. 10. 



3. 



30. (I. 



C'l. 5938, 5934 a, 439. 



