No. 01 480. 



Reading Telescopes. 



895 



61 452. 1 : 6. 



61 454. 1 : 12. 



61 478 61 480. 1 : 5. 



Plate Glass and Milk Glass Scales, manufactured of glass plates specially prepared for this 

 purpose and plane polished on both sides; with finely etched millimetre graduation 

 and mirror figures. 



s. (1. 



The scales are also made in other lengths and if desired are figured throughout or, commencing 

 from the centre, coloured red in one direction and black in the other, and are also provided with 

 figures for direct reading. If desired, the plate glass scales are supplied slightly ground in order to 

 illuminate the graduation from the back or for enabling them to be used for objective reading. 



The Milk Glass Scales are used permanently in a number of Laboratories on account of their 

 brilliancy. 



Devices for Objective Reading in Lecture Rooms, i. e., for Reflecting Galvanometers: 

 see Nos. 61,31061,316, p. 879; Nos. 61,34361,345, p. 883. 



Reading Telescope, Figure, adjustable horizontally and vertically, or simply micrometri- 

 cally. The celluloid scale is fitted under the telescope; ocular extension movable by rack. 



List No. 61,478 61,479 61,480 



Objective Diameter 27 33 40 mm 



Magnification 16 23 27 times 



7.10.0 9.5.0 11.10.0 



For illuminating Scales we recommend 2 Table Lamps No. 50,114, p. 21, at 0. 18. each. 

 Stands for setting up Reading Telescopes: see Nos. 51,12") 51,131, p. 205. 



CM. JG9S, 2393, -':!!J7. 



