No. 54221. 



Absorption Vessels, Reagents. Reversal of Sodium Line. 



517 



54 214. 1 : 6. 



54 217. 1 : 6. 



54 199. 2 : 5. 



54 203. 1 : 5. 



54218. 



4. 



54221. 1 



54.199. Coloured Plate with Coal-tar colours, for absorption experiments with transmitted s. d. 

 light, Figure 0. 13. 



The slab contains eight different colours and a dark and a light tint for each colour. As shown 

 in illustration, white strips are free between the colours so that the absorption spectrum can be con- 

 veniently compared with the pure spectrum. 



54.200. - - idem, simpler, with only one tint for each colour; the single colours are sepa- 

 rated by black strips 0. 6. 



54.201. Absorption Colour Plate for absorption experiments with reflected light, with seven 

 coloured cross strips 0. 4. 



54.202. Crystal Plates showing absorption phenomena: Uranite, Chalcolite, Parisite, Zir- 

 conium, Didymium Glass each 0. 6. to 0. 10. 



54.203. Preparations for Spectrum Experiments, in box, Figure, containing: 6 pairs rods 

 of silver, platinum, aluminium, zinc, copper, iron; 12 small bottles with parallel walls, 

 filled with absorbent liquids; 6 spectrum tubes; 10 small bottles with chlorides; 10 glass 



tubes with platinum lugs 4. 4. 



Salts for Spectrum Experiments, chemically pure, in preparation glasses: 



List No. 54,204 54,205 54,206 54,207 54,208 54,209 54,210 



Na K Li Ba Sr Ca Eb 



0.0.6 0.0.6 0.0.6 0.0.6 0.0.6 0.0.6 0.1.0 



54.214. 10 Reagents, Figure, in small bottles with ground-in stoppers, fitted in block 



for storing 0. 15. 



54.215. --idem, 6 Reagents 0. 10. 



54.216. Box with Salts and Small Bottles, of mahogany, containing 10 Salts in small flasks, 



and 14 small bottles for absorption phenomena 1. 16. 



54.217. Box with Tubes, small Glass Vessels and Reagents, containing: 5 tubes of 2, 3, 10, 

 15, 20 cm length with ground end surfaces; a flat glass vessel with detachable parts; 

 2 glasses filled with NO 2 and Iodine; 10 glasses filled with salts; 12 glasses for absorption 

 phenomena; 10 glass tubes with platinum lugs 3.12.0 



54.218. Collection of 18 Preparations, Figure, for Spectroscopic investigations, in glass 

 vessels having platinum wires, as follows: Ba 2 Cl 2 + 2H 2 O; CuCl 2 + 2H 2 O; CsCl; CaCl, 

 +6H 2 0;KaCl;In 2 Cl 6 ;LiCl; XaCl; PbCl 2 ; BbCl; SrCl a + 6H 2 O; T1C1; Se; ZnCl 2 ; TeCl^ 



and solutions of Di (NO 3 ) 3 ; KaMnO 4 ; Er (NO 3 ) 3 , in box 2. 4. 



54.220. Apparatus for Reversal of the Sodium Line, after Bunsen (W. D. Fig. 297 [280]; M. P., 



9 th Edn., II, 1, Fig. 234) 0. 18. 



54.221. - - idem, after Weinhold, Figure (W. D. p. 408 [375]), 1 Teclu and 1 Bunsen 

 Burner on one base, and one asbestos slab 0. 16. 



Cl. 3633,1436, 1437, 1438, 

 3302, 1440. 



