No. 54594. 



Polarisation of Light. 



551 



54 593. 1 : 12. 



54 594. 1 : 5. 



Apparatus for Fresnel's Explanation of the Rotation of the Plane of Polarisation; see Nos. 51,817 

 and 51,818, p. 259. 



54,589. Model for showing the Rotation of the Plane of Polarisation in quartz and in a sugar 

 solution, after Grimsehl (Ztschr. f. d. phys. u. chem. U. 20, 1907, p. 220) 



* 52,047. Polarisation Apparatus for Demonstrating the Properties of Polarised Light, for the 



Whirling Table (M. P. II, 1, Fig. 693 [671]), see Fig. 52,047, p. 285 



* 54,590. Polarisation Apparatus for the Projection Lantern, Figure (W. D., Fig. 322 [304]) 



The apparatus consists of a screen with tube, an uncoated mirror as polariser, a black mirror 

 and a set of glass plates each with tube and rotary mount, as analysers. 



* ~>4,o!)l. Further Set of Glass Plates for No. 54,590, for use as polariser (W. D. p. 451 [414]) 



* 54,592. Polarisation Apparatus after Duboscq, Figure, for the Projection Lantern (M. P., 



9 th Edn., II, 1, Fig. 638), with two mirrors, lens and receiving screen, on stands . . 



* 54,593. Polarisation Apparatus, Figure, for objective demonstration of the phenomena 



of polarisation by reflection and refraction (M. P. II, 1, Fig. 699 [677]), with 2 glass plate 

 columns, diaphragm and lens, on tall stands; can be used with the heliostat or a 

 projection lantern 



* 54,594. Demonstration Polariser after Grimsehl, Figure (Ztschr. f. d. phys. u. chem. U. 



18, 1905, p. 321), with direct vision for demonstrations 



In this very neatly constructed apparatus a coated mirror and a blask mirror a.e filled as 

 reflection polariser. The apparatus can be rotated about the axis formed by the incident ray of light. 

 The angle at which the ray of light falls on the polariser is 55. A convex lens given in is used for 

 experiments with converging polarised light. No. 54,595 is used as analyser. 



s. d. 



3. 0.0 



1.10.0 

 2. 8.0 



0. 18. 

 3.12.0 



4.15.0 



1. 2.0 



* Can be used with the Projection Apparatus. 



Cl. 313, 314, 



31fi l , 315 2 , 3806. 



