534 



Microscopes. 



No. 54 390 



54 390. 1 : 3. 



54 392. 1 : 3. 



s. d. 



21. 0. 



o 



19. 5.0 



54.390. Large Microscope, Stand la, Figure, with canting joint, with round centering 

 stage, coarse and fine tube focussing, millimetre graduation on draw tube; large Abbe 

 Illuminating Apparatus; with iris diaphragm; optical outfit for 26 1400 diameters, 

 together with box 



The Optical outfit comprises 4 Huyghenian oculars, 3 achromatic objectives, 1 homogeneous oil- 

 immersion, and triple nose-piece. 



54.391. - - idem, with fixed stage, simple illuminating Apparatus and simple Optical Out- 

 fit for 60 800 diametors 



The optical Outfit is correspondingly simpler. The coarse tube focussing is effected by rack and 

 pinion, and the fine by a low-pitch micrometer screw. 



54.392. Large Microscope, Stand B, Figure, with tilting joint, large round centering stage, 

 coarse and fine tube focussing, millimetre graduation on draw lube, large Abbe Illumi- 

 nating Apparatus, Optical Outfit for 60 1400 diameters, together with box .... 



The coarse tube focussing is by rack and pinion and the fine by a worm and worm wheel. Tne 

 optical outfit comprises 2 achromatic objectives, one homogeneous oil-immersion objective. 1 triple 

 in ise-piece and 3 Huyghenian oculars. 



54.393. - - id em, with Abbe Illuminating Apparatus of smaller pattern, arranged for raising 

 and lowering 18. 



54.394. Large Microscope, Stand Ic, Figure, with tilting joint, with rectangular fixed 

 stage, base and pillar in one pieee, coarse and fine tube focussing, millimetre gradual ion 

 on draw tube, Abbe Illuminating Apparatus with iris diaphragm, Optical Outfit for 



26 1400 diameters, together with box 17. 



The coarsi 1 tube fnriii-siiii;- i< i-H'rcted by rack anil pinion. Mini the fine by low-pitch micromi-ti-r 

 scrrw. The Optical Outfit comprises H achromatic objectives, 1 homogeneous oil-immersion, 1 triple 

 revolving nose-piece and 3 Huygheniao oculars. 



54,39."). - i d e m, with simple Illuminating Apparatus and simpler Optical Outfit for 60 to 



800 diameters 1.",. 10. o 



21. 5.0 



0.0 



7. o.O 



n. 51137, 5941. 



