ATLAS OF ABSORPTION SPECTRA. 



59 



For convenience in identifying the stronger spark lines, fig. 99, pi. 25, is given.* 

 The numbers on this positive correspond to those preceding the wave-lengths belov/. 

 The wave-lengths were derived from the two following sources: 



"An Introduction to the Study of Spectrum Analysis," by W. M. Watts. Long- 

 mans, Green & Co., 1904. 



"Measurements of the Wave-lengths of Lines of High Refrangibility in the Spectra 

 of Elementary Substances." Hartley and Adeney. From the Philosophical Transac- 

 tions of the Roj'al Society. Part I, 1884. 



3 

 4 

 5 

 6 



7 

 8 



9 

 10 

 II 

 12 

 13 

 14 

 15 

 16 



17 



18 



19 

 20 



2X 

 22 

 23 

 24 

 25 

 26 



W.-l. 



2024. 

 2060 

 . 2062 

 2099 

 2I3S. 

 2144. 

 2194. 

 2239. 

 2265. 

 228S 

 2306. 



2313' 



2321. 

 2329. 

 2502, 

 2558, 



2573 

 ' 2710 

 .2712, 

 2748, 

 2770 

 2801 



2837' 

 2880. 

 2980 

 3007. 



3035 

 3072 



I 3076 



Radia- 

 tor. 



2 Zn. 



.0 Zn. 



,3 Zn. 



.5 Cd. 



,7 Cd. 



,9 Cd. 



,1 Cd. 



,1 Cd. 



,7 Cd. 



,0 Cd. 



2 Cd. 



3 Cd. 

 .1 Zn. 



Zn. 



Cd. 



Air. 



Zn. 



Cd. 



Zn. 



Zn. 



Cd. 



Cd. 



Cd. 

 o Air. 

 .g Zn. 



.0 I 



Radia- 

 tor. 



27. 

 28. 

 29. 

 30- 

 31- 



32. { 



33. { 



34- 

 35- 



36. { 



37- 



3S.{ 



39- 

 40. 

 41. 

 42 



Cd. 

 Cd. 

 Cd. 

 Zn. 

 Zn. 



|372.2U. 



1 3076.0 I 



43. { 



44. 

 45- 



46. { 



47- 

 48. 

 49. 



3133.3 

 3250-5 

 3261.2 

 32S2.4 

 3302.7 



33^9-3 I Air. 



3331.5 I 



3345.1 I Zn. 

 3345-5 i 



3407.7 Cd. 

 3436.9 Air. 

 3466.3 1 p , 



3467.8 ( '-'' 

 3530.0 Cd. 



3610.7 1. Cd. 

 3613.0 I 

 3682.6t 



3712.2 Air. 



3726.6 Air. 



3749.8 Air. 



3839-3 \ 

 1.7) 



Air. 

 Air. 



384 

 3881.9 

 3919.2 Air, 

 3954.S I Air 

 3956.2 ( 

 3972.5 Air, 

 3995.1 .\ir, 

 4041.4 Air, 



No. W.-l. 



I 4070.C 



50. j 4072..] 

 I 4076.1 



51. 4119. 

 } 4132. 

 ^^- U133. 

 53. 4145. 



54- -^ 



^^ 1 4153- 



f422S. 



55- \ 4236- 

 I 4241- 



56. 1^316- 

 ^ 1 4318. 



57. 4349 



58. 4367, 



59. 4415 



Radia- 

 tor. 



Air. 



Radia- 



I]'' 



Air. 

 Air. 



j 4447 



60. , 

 .4447 



61. 4530 



62. 4576, 



63. 4601, 



64. 4607 



65 

 66 

 67 

 68 



4614 

 4621 

 4626 

 4630. 



4 

 8 

 8 

 9 Air. 



Air. 



Air. 



Air. 

 Air. 

 .\ir. 



Air. 



Air. 

 Cd. 

 Air. 

 Air. 

 Air. 

 Air. 

 Cd. 

 Air. 



.1I 

 2 f 



6 

 o 

 7 



9JAir. 

 4i 



92 t 



The following table facilitates the finding of the numbers, names, etc., of all the 

 substances which, have an absorption spectrum more or less similar to that shown by a 

 selected spectrogram. The third column gives the number of every substance referred 

 in the text to the plate and figure of the preceding columns. 



Plate. Fig. 



3 

 3 

 3 

 4 

 5 

 5 

 6 

 6 

 6 

 7 

 7 

 8 



9 

 10 

 10 

 10 



II 

 12 

 13 

 14 

 19 

 20 

 21 

 22 

 23 

 25 

 26 



31 

 36 

 37 

 39 

 40 



33, 63. 79, "6, 118, 135, 146. 



31, 147- 



39, 139. 



181. 



19, 61, 105, 125. 



126, 143. 144. 



126, 138, 144. 



71, 72, 73, 75- 



38, 44. 



70. 



59,64,65,66,67,70, 140. 



26, 27. 



57, 58. 



25, 40, 53- 



42. 



9, 29. 



The negative was not a single exposure. To stand reproduction the extreme ultra-violet was "favored." 

 t "Doubtful Origin." J The subscript 2 denotes the second order of spectrum. 



