Physical Apparatus for Projection. 



1095 



. . . 

 54.505. Newton's colour glasses, 70 mm diameter 0. 16. 



54.506. idem, 100 mm diameter 



54.507. idem, 120 



54.508. idem, 150 .'.'.''.'.'. 



54.509. Newton's colour glasses, with stand, 

 rotary, 70 mm diameter 



54.510. idem, 100 mrn diameter . 



54.511. idem, 120 ,, 



54.512. idem, 150 \ 



54.514. Interference Apparatus for Fresnel's 



mirror experiment, for projection apparatuses 

 having 43 mm diameter objective .... 



0. 

 4. 

 12. 



12. 



18. 



2. 4. 

 2. 10. 



8. d. 



)4.075. Laminated mirror after Oosting .... 2. 10. 



.-)L',043. Oscillating prism for the whirling table 1. 5. 



52,044. idem, larger 1. 10. 



54.141. Collimator tube and micrometer gap for 



demonstrating the spectrum 1. 4. 



54,144. Revolving device for arc lamps .... 1. 0. 



50,922. 6 Cored carbons filled with salts ... 0. 9. 



54,176. 6 Small flasks with absorbent liquids . 0. 10. 



- idem, 9 liquids 0. 15. 



54.178. idem, 12 liquids 1. 0. 



54,180. Absorption box, 55 x 35 x 10 mm ... 0. 3. 



54,186. Hollow crystal glass cubes, 50 mm . . 0. 3. 



54.190. Double absorption box 0. 12. 



54.191. Absorption vessel, wedge-shaped .... 12. 



54.194. Absorption vessel for gases 1. 10. 



54.195. idem, for filling with gases .... 0. 8. 



54.196. Stand for holding absorption boxes, 

 troughs, preparations 1. 0. 



54.197. 3 Gelatine plates for absorption experi- 

 ments 0. 2. 



54.198. 3 Coloured glass plates 0. 3. 



54.199. Coloured plate 0. 13. 



54.200. idem, simpler 0. 6. 



51.201. Absorption colour plate for reflected light 0. 4. 



54.202. 5 Crystal plates with absorption 

 phenomena 2. 10. 



54.225. Bunsen-burner for -eversing the sodium 



line 0. 14. 



54.226. Stand with illuminating tube for reversing 



the strontium line 0. 16. 



54.233. Solar spectrum, transparent .... 1. 0. 



54.319. Apparatus for imitating the irradiation of 



the moon's crescent 0. 8. 



54.320. Lantern slides after Plateau for demon- 

 strating irradiation 0. 3. 



54.324. Projection stroboscope 1. 0. 



54.325. 3 Extra discs for above 0. 6. 



54.326. Projection stroboscope with showing 



dancers 1. 4. 



51.067. Cinematograph 7. 10. ft 



51.068. Films for 1 metre length 0. 1. 6 



54,32^. Anorthoscope 1. 6. 



54.328. Apparatus for optical fatigue and the 



successive colour-contrast 0. 6. 



54.331. idem, after Weinhold 0. 10. 



54.332. Apparatus for successive and simultaneous 

 colour-contrast 0. 8. 



54,3,,, .. 2 Coloured glass plates for simultaneous 



contrast . . 0. 6. 



54,334. Apparatus for showing the contrasted 



colours as coloured shadows . . ... 0. 12. 



54.338. Projection plate for optical illusions, 

 showing parallel lines apparently diverging 0. 6. 



54.339. 2 Plates for above, showing parallel lines 

 apparently bent 0. 3. 



54.340. idem, four right angles are showing 

 apparently acute and obtuse in pairs ... 0. 3. 



54.343. 2 Plane parallel glass vessels for objec- 

 tively demonstrating the colours of pigment 



mixtures 0. 16 



54.346. 2 Colour discs for the mixing of coloured 

 lights and the superposing of layers of trans- 

 parent colours 1. 5. 



9605. Projection chromoscope after Ives ... 13. 0. 



Photographs for above each 0. 7. 



54,350. Colour top with mixed colour effects . 1. 0. 



51.003. Small transparent projection screen . . 0. 10. 



54.501. Small metal frame for soap solution for 



demonstrating the colours of thin plates . 0. 2. 



4. 0. 



s. d. 

 - idem, having 55 mm diam. objective 4. 0. 



54.516. idem, having 60 mm diam. objective 4. 0. 



54.517. Fresnel's apparatus, size of mirrors 



30 x40 mm 2. 2. 



54.518. idem, size of mirrors 40 x 50 mm . 2. 8. 



54.519. idem, size of mirrors 50 x 60 mm . 3. 0. 



54.520. Fresnel's apparatus, simple, size of mirrors 



30 x 40 mm 1. 4. 



54.521. idem, size of mirrors 40 x 50 mm . 1. 12. 

 54,52<3. idem, size of mirrors 50 x 60 mm . 2. 0. 



54.523. Interference mirror on stand, with micro- 

 meter motion 7. 0. 



54.524. idem, without micrometer motion . 4. 16. 



54.525. Ocular micrometer after Fresnel .... 6. 0. 

 54,527. Interference apparatus after Grimsehl . 3. 10. 

 54,529. Interference apparatus after Classen . . 2. 10. 



54.536. Interference Prism (bi-prism) after 



Fresnel 1. 8 



54.537. Billet's half-lenses . . 2. 10. 



54.538. Lens for observing the interference bands 0. 16. 



54.540. Large bench for interference and diffrac- 

 tion experiments 27. 0. 



54.541. Diaphragmic disc with Schwerd apertures 1.10. 



53.907. Cylindrical lens on stand, 60 mm diameter 1. 4. 



53.908. idem, 80 mm diameter 1. 10. 



54.560. Photographed grating after Nobert . . 0. 18. 



54.561. Copy of a genuine Rowland Grating . . 1. 4. 



54.565. Photographed diffraction grating ... 0. 5. 



54.566. Diffraction grating after Rowland. Price 

 on application. 



Further diffraction gratings and stands see 

 page 549. 



54.575. Phase reversing plate, after Wood ... 0. 10. 



54.576. Circular photographed grating 1. 0. 



51,066. Projection diffraction -chromoscope, with 



optical bench 11. 10. 



51,066a. idem, without optical bench ... 10. 0. 



54.584. Dust glass for colour rings 0. 4. 



54.585. Reflecting stephanoscope after von 

 Lommel 0. 16. 



54.586. idem, larger 1.6 



52,047. Polarisation apparatus for the whirling 



table 1. 10. 



54.590. Polarisation apparatus after Weinhold . 2. 8. 



54.591. Further Set of Glass Plates, as polariser 0. 18. 



54.592. Polarisation apparatus after Duboscq . 3. 12. 



54.593. Polarisation apparatus on stand .... 4. 15. 



54.594. Demonstration polariser after Grimsehl . 1. 2. 



54.595. Demonstration analyser after Grimsehl . 1. 15. 



54.596. Plate of mirror glass with haft . . . 0. 6. 



54.597. Glass tube for polarisation in liquids . 1. 8. 



54.598. Auxiliary apparatus for demonstrating 



the calc-spar cross 2. 0. 



54.599. Demonstration polarisation apparatus 



after Grimsehl 1. 10. 



54.600. Simple polarisation apparatus with tour- 

 maline plates 3. 0. d 



51,074. Polarisation apparatus for objective de- 

 monstration 7. 0. 



54.601. 1 Set of preparations 3. 5. 



54.602. Large projection-polarisation apparatus 



after Duboscq and von Lang 34. 0. 



54,614. Column of glass plates .... 1. 16. 



54.626. Polarisation apparatus after Mach ... 13. 0. 



54.627. Wedge compensator after Babinet ... 5. 0. 



54.628. Compensator after Soleil 6. 10. 



C4,634. Large Paalzow optical bench 34. 0. 



54,635. Small Paalzow optical bench 16. 0. 



Auxiliary apparatus referring to polari-\ 

 sation and refraction, polarisation prepara-l., 

 tions, spectrum phenomena, microscopical!, 

 phenomena, interference and diffraction seel 

 pages 559 561 J 



54.641. Glass press for showing the double re- 

 fraction by pressure 1. 2. 



54.642. Fresnel's press 2. 15. 



54.643. Glass bending press 1. 2. 



54.654. Rapidly annealed glasses 2. 10. 



54.655. Crossed annealed glasses 0. 10. 



Preparations of gypsum, mica, calc-spar \ Prices as per 



and quartz see pages 564 566 | se'eclion 



