No. 54 144. 



Spectrum Lamps. 



513 



54136. 1:3. 



54137. 1:12. 



54 143. 1 : 8. 



54139. 1:6. 



54142. 1:5. 



54144. 1:3. 



51,130. Spectrum Lamp with angular pulveriser after Beckmann, Figure (Ztschr. f. phys. 

 Chemie, 40, p. 470), with burner, rubber tubing and pinch-cock, especially for labo- 

 ratory work 



54.137. Large Spectrum Lamp for chemical pulverisation, after Beckmann, Figure, for 

 demonstrating the influence of coloured flames on environment (Ztschr. f. phys. 

 Chemie, 57, 1907, p. 641) 



54.138. 7 Diaphragms for Relief Spectra (M. T. p. 187 [188]) 



* r>4,139. Lantern for objective Chemical Spectra, Figure (W. D. Fig. 295 [278]), for demon- 



strating the principal spectra by means of sets of Bengal Lights 



54,140. Lantern with Nernst Lamp, after Grimsehl, for optical experiments (Sonderhefte d. 

 Xtsehr. f. d. phys. u. chem. U. 1, p. 53), with lens mount, diaphragms, gap, etc. . . 



* r>4,141. Collimator Tube with Micrometer Gap after Grimsehl, on Stand, for demonstrating 



the spectrum objectively (Ztschr. f. d. phys. u. chem. U. 20, 1907, p. 209, Fig. 1C) 



54.142. Mitscherlich's Apparatus, F i g u r e, with 8 glass tubes with platinum wicks, for 

 permanent spectra 



54.143. Revolving Device on Stand, Figure, for observing 6 spectra consecutively, con- 

 sisting of six carbon rods impregnated with different salts 



t,144. Revolving Device for Arc Lamps, Figure, for rapidly alternating six carbon rods; 

 to be used instead of the lower carbon of the projection arc lamp 



50,922. 6 bored Carbons with Solid Carbons, the former filled with salts, for spectrum e 

 ments (see No. 50,922, p. 171) 



* Can be used with Projection Apparatus. 



ci. Mil, 5928, 



1362, 1412, 



s. d. 



0. 12. 



1.10.0 



1. 4.0 



1. 6.0 

 2.18.0 

 1. 4.0 

 1. 6.0 

 2. 10. 

 1. 0. 

 0. 9.0 



5871, 

 1414. 33 



