Xo. 54069. 



Hollow Prisms, Prim-Combinations. Rainbow. 



503 



54 068. 1 : 5. 



54 035. 1 : 6. 



Achromatic Prisms, 



54 036/39. 1 : 5. 



54 062. 1 : 4. 



54 063. 1 : 6. 



Figure, on stand, arranged for separating the prisms : 



List No. 54,036 54,037 54,038 54,039 

 Side-Length, abt. mm 30 35 40 50 



1.8.0 1.12.0 2.0.0 2.8.0 



Prism System after Amici, with direct vision, triple, consisting of 1 flint glass prisma and two 

 crown glass prisms: 



54,040 54,041 54,042 54,043 54,044 54,045 



10 15 20 25 30 35 



1.0.0 1.10.0 2.0.0 2.10.0 3.5.0 4.5.0 



List No. 

 Side, abt. mm 



(a) Without Mount . 



(b) With Mount, Dia- 

 phragm and Stand 



2.0.0 2.10.0 3.0.0 3.10.0 4.10.0 5.10.0 



- idem, quintuple, consisting of two flint glass and three crown glass prisms : 



54,052 



38 

 8.0.0 



54,059 



60 

 12. 10. 



List No. 54,046 54,047 54,048 54,049 54,050 54,051 



Side, abt, mm 10 15 20 25 30 35 



(a) Without Mount .1.5.0 2.5.0 3.5.0 4.10.0 5.15.0 7.0.0 



(b) With Mount, Dia- 

 phragm and Stand 2. 5. 3. 5. 4. 5. 5. 10. 7. 0. 8. 5. 9. 10. 



Rutherford's Prisms: 



List No. 54,053 54,054 54,055 54,056 54,057 54,058 



Aperture, mm 25 30 35 40 45 50 



2. 10. 3. 0. 3. 15. 5. 0. 6. 5. 9. 0. 



54.060. Model of the Porro Prism-combination after Weinhold (W. D. Fig. 319) 



54.061. Adjustable Rotary Stage for setting up any kind of Prism 



54.062. Pyramidal Rectangular Prism, Figure, of crystal glass, in mount on stand, for 

 producing four spectra 



54.063. Crystal Glass Cone, F i g u r p., in Mount on Stand, for producing a round spectrum 

 (rainbow) 



54.064. - - i (I e m, of flint glass, in mount, on Stand 



54.065. - - i d e m, of crown glass, in mount, on Stand 



54.066. Crystal Glass Cone, without mount or stand 



54.067. Cone, after Thompson, for producing a Rainbow, on Stand, cf. Fig. 54,068 . . . 



The vessel above the cone is filled with cinnamic ethyl ether. 



54.068. - - idem, without stand, Figure... 



L 4,069. Rainbow Apparatus after Grimsehl (Ztschr. f. d. phys. u. chem. U. 20, 1907, p. 213), 

 consisting of a glass vessel representing the rain-drop, on Stand, and a receiving screen 

 with gap 



Large Optical Benches with Accessories for Objectively 

 Projecting the Spectrum, etc.: see further on in list. 



1. 4.0 

 0.16.0 



2. 0.0 



1. 5.0 



2. 5.0 

 2. 0.0 

 0. 10. 

 5.15.0 



4. 5.0 

 2. 0.0 



CI. 4924, 



8107.1343,1346,1347. 



B. d. 



