No. 51 014. 



Travelling Tables. Projections Screens. 



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51. (Mil. Travelling Type Stand Table for Projection Apparatus, Figure, upper part can B. d. 

 be rotated. It has a top in three parts, 50 cm width and 1.70 in total length, one part 

 being adjustable vertically; height of fixed top 1 m. As supplied to the Physical In- 

 stitute of Leipzig University 14. 0. 



The substructure rests on double rotatory rollers; it is constructed of pine and carries the oak 

 tops, which are composed of frame and pannellings. The fixed part of the top is 90 cm long, while 

 the lengthening leaf and the adjustable part are each 40 cm long. 



51,002. Travelling Type Projection Table, with inclinable top, Figure; top with height 

 adjustment, an extending and a separate leaf (the latter of these having vertical ad- 

 justment); large top in the undermost position 90 cm high. Total length of top 1.80 m; 

 width, 55 cm. As supplied to the Physical Institute of Leipzig University . . . . . 17.10.0 



The substructure has 4 massive legs and rests on rotatory double rollers; it is constructed of 

 pine and carries the vertical adjusting arrangement for the table top. The table can be firmly fixed 

 by means of a foot screw and hand wheel. The tops are of oak, composed of frame and pannellings. 

 The large table top, weighted at one end by a 15 kg lead weight, is 1 m long, the two leaves 

 each 40 cm long. 



Projection Screens. 



51.003. Small Transparent Projection Screen, size 0.5x0.5 m, for facilitating the focussing ; 

 of the apparatus in interference experiments, diffraction experiments, etc., with frame 



and stand O.lu. o 



51.004. Projection Screen, seamless, of linen, 2 m square 0.13.0 



51.005. do., constructed of shirting 0. 7. o 



Projection Screen with Rolling-up Device by means of draw cord, F,i g u r o. the screen being 

 of prepared pure white fabric, suitable for reflected light; for fixing firmly on the wait, 

 on the ceiling, or above the cornice of the blackboard frame. 



List No. 51,006 51,007 51,008 51,0 09 51,010 51,010 a 



Size m 2.5x3 3x3 3.5x3.5 4x4 4.5x4.5 r.<5 



2. 10. 3. 0. 3. 15. 5. 5. 7. 0. 9. 5. 



These screens have a dead white surface, are 3 m long without seam, and are kept above the 

 cornice under waxed cloth strips, thus preventing their becoming damaged or covered with dust when 

 not in use. 



NEW. Projection Screen with Metallic Coating, with draw-cord device for rolling up (cf. 

 Fig. 51.007), for reflected light; for fixing firmly on the wall, the ceiling, or above 

 the cornice of the blackboard frame. Light construction screen. 

 List No. 51,011 51,012 51,013 51,014 



Size m 2x2 2.5x2.5 3x3 3.5x3.5 



3.0.0 4.5.0 5.10.0 7.0.0 



Please refer also to the travelling type Projection Table No. 50,379, p. 77, and 

 the Projection Table firmly fixed on the Lecture Table, Fig. 50,346 A, p. 58. 



Cl. 282. 



12* 



