1222 



Megadiascope. 



9522 

 9523 

 9524 



9525 

 9526 

 9527 

 9528 

 9529 



9530 



s. (I. 



. Diapositive Holder with change frame for plates 1. 5. 



. Sliders with upright, for mounting nicols, lenses, etc. on the optical bench . Each 0. 10. 



, - - do., the column adjustable laterally by screw motion 0. 18. 



Objective Holder with fine focussing, Fig. 30, without lenses 1.10.0 



Special carbons for the projector of Megadiascope, for 25 amperes. Price per 10 pair 



- do., for 30 amperes Price per 10 pair 



- do., for 50 amperes Price per 10 pair 



Portable Iron Table for the Megadiascope, large model (see F i g. 27), Avith oak top 



and extending leaf 8. 15. 



The rheostat for the lamp can be placed on this and the following table, as shown in the one illustrate' 1. 



Portable Table for the Megadiascope, small model (F i g. 31) with extending leaf. Price 

 exclusive of Megadiascope and Kheostat 3. 0. 



0. 

 0. 



0. 



2.6 



4.0 

 6. 



Special Outfits. 



For all experiments five sliders with uprights No. 9523 and one slider No. 9524 are necessary. 



Microprojection with the Projection Microscope. 



9531. Projection Microscope (Fig. 7 and 7 a) on slider, with coarse adjust- 

 ment by rack and pinion and fine focussing by micrometer 

 screw; with stage cooled by flowing water , object holder, insertion 

 tube for the objectives and revolving diaphragm 5. 10. 



9532. Ocular Tube for above 0. 5. 



9533. Revolving Collar for 3 objectives 1 . 2. 



9534. Revolving Collar for 2 objectives 0. 16. 



9536. Insertion Tubes for the objectives Each 0. 3.0 



9537. Hartnack Objectives: No. 2 3 5 7 



Price: 18s. 1.7.0 1.13.0 1.18.0 

 Zeiss, Leitz or Winkel objectives can also be supplied, and we will gladly submit prices. 



9538. Huyghen Oculars: No. 2 3 4 



Price: 5s. 5s. 5s. 



Box for storing the Projection Microscope, revolving collars, objectives and oculars . 0. 16. 



9539 

 9540, 

 9541, 



Object Micrometer, photographed on glass, 2 mm = = 200 divisions 0. 3. 6 



Collection of Microscopical Preparations for school use, 50 preparations in calico case 



(Fig. 7b) with complete text 1.15.0 



This collection contains: mole's hair, fishbone, bone; scale of eel; spider's foot; spinning wart; 

 proboscis of fly, bee and butterfly; feeler of beetle; eye of fly; spiracle; foot of fly; paunch of ruminants; 

 sting of wasp; gnat's wing; scale of butterfly; silk; corn thrips; phylloxera; louse of domestic hen; 

 trichina; joint of tape-worm; radula; anchor-body of sea-cucumbers; moss corals; polypus; calcareous 

 spicules of corals; mail-coat animalcule; sponge; parenchyma; prosenchyma; cork; spiral duct; dicoty- 

 ledons; epidermis; scale of leaf; crystals; sporangia; pollen; cotton; starch; peat-moss; corn mildew 

 (black rust); smut; bunt; conferva; seaweed; diatoms; marl-slate. 



9542. - - do., 25 objects in case 1. 0. 



Larger collections and single preparations as per separate list. 



Micro-Projection with a Stand Microscope. 



9543. Microscope Stand for Projection and Microphotography, Fig. 8, w i t h m i c r o- 

 photographic stage and the usual condenser, collapsible, 



Price, without lenses 20. 15. 



Instead of being fitted with microphotographic stage, the stand can also be fitted 



with large transverse stage at the same price, if desired. 



9~544. Above Microscope Stand, with folding condensers 22. 0. 



9545. Clomplete Optical Outfit for Microscope Stands Nos. 9543 or 9544 81. 3. 6 



This complete outfit contains: 4 apochromatic objectives, focus 1(5 mm., num. aperture 0.3 ( 4); 

 focus 8 mm., aperture 0.65 ( 5); focus 4 mm., aperture 0.95 ( 7); focus 3 mm., aperture 1.30 

 ( 15); 2 achromatic objectives for projection without the use of an ocular, focus 26 mm., aperture 0.17 

 ( 1.7.0); focus 17 mm., aperture 0.3 ( 1.10.0); 5 Zeiss Microplanars, ratio of aperture 1 : 4.5, 

 focus 20 mm. ( 5), focus 35 mm. ( 5), focus 50 rnm. ( 5), focus 75 mm. ( 6), focus 100 mm. (6); 



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