480 



Reflection of Light. 



No. 53810 



53 810 A. 1:7. 



53 810 B. 1:7. 



53 814 A. 1:5. 



53 814 B. 1:6. 



53,810. Demonstration Goniometer after Weinhold, small pattern, cf. Figures A and B 



The Goniometer is used as No. 53,806. 

 apparatus is divided in whole degrees. 

 Accessories as No. 53,806. 



The height is 13 cm, diameter of circle 38 cm. The 



53,811. - - idem, with a second graduation on brass, in half degrees, and with vernier reading, 



14. 



S. (1. 



0.0 



for subjective observations 



53.812. - - the same apparatus as No. 53,810, but without telescopes, prism or box . . . 



53.813. Simple Goniometer for students' use, after Noack (Noaek, Leitfaden t'iir Schiiler- 

 iibungen, p. 9), for use with accessories No. 53,815 53,817 and 51,851 1; can be used 

 as a Demonstration Goniometer for subjective and objective observation, as a Spec- 

 trum Apparatus and for various other optical experiments; as a Magnetometer, Galvano- 

 meter, and Tangent Galvanometer; for Demonstrating the Parallelogram of Forces, 

 the Reflection of Impact and of Torsional Effects 



.~>.'5,814. Demonstration Goniometer after Noack, Figures A and B (/tschr. f. d. phys. 

 u. chem. U. 3, 188990, pp. 1 and 57) 



The divided circle of zinc, with German silver edge, is very accurately graduated in half-degrees 

 and permits of readings being made to 5 minutes with the aid of the vernier provided on the 3 alidades 



Cl. 3942, 3941. 

 1250, Ii55. 



16. 

 11. 



(I. (I 



10. 



15. 



0.0 

 0.0 





