PHOTOMICROGRAPHIC APPARATUS 



THE following lists -(I-III) of apparatus are suitable for more 

 or less complete photomicrographic outfits, but do not include 

 items designed for specialised work such as metallography. 

 No. I is sufficient for most amateurs, though scarcely up to 

 the standard required for critical photomicrography, No. II 

 is, however, adequate for this purpose. The cost of III is 

 necessarily very much higher than either of the others, but 

 such an equipment is much to be desired if a large amount of 

 critical work is contemplated. Guidance in the selection 

 of the most suitable items for any particular case will be found 

 in the earlier chapters of this book. For the cost of apparatus 

 reference should be made to the manufacturers' catalogues. 



I. Student's microscope. 



Objectives (achromatic) and Eyepieces. Set (iv.), 



p. 82. 



Abbe condenser. 



Camera. J or J plate stand camera adapted. 

 Baseboard with sliding carriers. 

 Lamp. Incandescent gas or Nernst. 

 Collector. Adjustable bull's-eye with iris diaphragm. 

 Colour Screens. Set of nine 1" gelatine squares, or 



green and orange glasses. 

 Cooling trough. 

 Focussing lens. 

 Stage micrometer. 

 Stops for dark ground illumination. 



II. Microscope of Group 2. 



Objectives (achromatic) and Eyepieces. Sets (i.), 



(ii.), or (iii.), pp. 81-82. 

 Condenser (achromatic). N.A. I/O. 



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