No. 53 778. 



Kaleidoscopes. Concave Mirrors. Covex Mirrors. 



477 



53752. 1:10. 



53753. 1 : 10. 



53 757. 1 : 6. 



53775. 1:6. 



53.751. Parabolic and Circular Mirror Ring for Demonstrating Catacautery, after Friedr. C. 

 G. Miiller (M. T., Fig. 130) 



53.752. Model of a Concave Mirror after Muhlenbein, Figure, with fixed and movable 

 coloured rods for demonstrating the path of the rays and the relations between object 

 and image 



53.753. Model of a Convex Mirror after Muhlenbein, Figure 



Spherical Concave Mirrors and Convex Mirrors, of Glass, of exactly 600 mm focal length, 

 Figure 53,757, ground optically true and silvered, in metal mount with haft and cover, 

 without stand, for use on the optical bench, for demonstrating the images and laws 

 relative to concave mirrors. 



The Concave and Convex Mirrors Nos. 

 a cover both back and front. 



53,762 53,765 consist of a single mirror provided with 



We supply Mirrors Nos. 53,754/57 and 53,762/65 also with an extra coat of gold for increasing 

 the durability; extra price for this 0.3.0. 



Spherical Concave Mirrors and Convex Mirrors of Glass, cf. Figure 53,775, in black polished 

 Wood Mount, with wood handle (M. T., p. 177). 



Convex Mirrors Concave & Convex Mirrors 



53,769 53,770 53,771 53,772 



100 150 100 150 



350 350 350 350 



0.4.0 0.7.0 0.6.0 0.10.0 



List No. 



Diameter mm 



Focal Length mm 



Each 



Concave Mirrors 



53,767 53,768 



100 150 



350 350 



0. 4. 0. 7. 



- i d e m, on Stand, Figure 53,775. 



List No. 



Diameter mm 



Focal Length mm 



Each 



Concave Mirrors 



53,773 53,774 



100 150 



350 350 



0. 10. 0. 13. 



Convex Mirrors 



53,775 53,776 



100 150 



350 350 



0. 10. 0. 13. 



Concave & Convex Mirrors 



53,777 53,778 



100' 150 



350 350 



0. 12. 0. 16. 



s. d. 

 0. 12. 



1. 2.0 

 1. 2.0 



CI. 6043. 6042, 1235, 1236. 



