484 



Refraction. Total Reflection. 



No. 53836- 



53 836. 1 : 5. 



M 



53 839. 1 



53 839, 53 840. 1 : 8. 



53.836. Light-Refraction Apparatus after Neumann, Figure, also for experiments on simple s d. 

 and total reflection, on stand with levelling screws, vertical adjustment, with head 

 graduated for convenience of reading (Ztschr. f. d. phys. u. chem. U. 8. 1894/5, p. 357) 4. 10. 



53.837. Light-Refraction Trough after Neumann, Figure, simple pattern (Ztschr. f. d. 

 phys. u. chem. U. 7, 1893/4, p. 29), on stand with glass vessel and rubber connecting 

 tubing 0. 16. 



53.838. Rectangular Glass Box for Experiments on Refraction and Total Reflection (W. D. 

 Fig. 277283 [263 269]) and for the curvilinear propagation of light (W.I)., p. .'5.'! 7 



[310]), 25 cm long, 8 cm wide and 16 cm high 0. 18. 



53.839. - - i d e in, with support and adjustable mirror, F i g u r e s, otherwise as No. 53,838 2. 8. 



53.840. Rotary Mirror for inserting the glass box of the preceding apparatus, sec Figure, 



with lever for conveniently adjusting; for use under water 0. 18. 



53.841. Refraction Box after Stahlberg, F i g u re (Xtschr. f. d. phys. u. chem. V. 15, 1901, 



p. 65), with 2 watch glasses inserted in one of the side walls 



One half of the box is filled with floure.-eent water, thr oilier half with tol>;iei-o nmke. A mirror, 

 which can be rotated and adjusted from the outside, is filled on the lid. 



In order to observe simultaneously the refraction and reflection occurring for different angles. 

 use is made of a small glass, uith slot diaphragm, which has to lie fixed between the I wo longitudinal 

 s; this glass reflects (by total reflection) the transmitted light in single cones in every dim-lion. 



CI. I2l)8, 1299, 

 1286, 1287. 



2. 8. 



