342 Scientific Proceedings, Royal Dublin Society. 
MEASUREMENTS OF SPECTRA. 
Measure: Mark and Curve ene Element and Accepted 
each Intensity. Reading. Reni. Wave-Length. 
259°35 S — +15 5350 Tl 5350-6 (10) 
264:00 Au No. 7 263°85 5230°58 Au 
267-10 M - °15 5153 Tl 5152°7 
270-40 9 3% — 15 5078 Tl 5078°6 (6) 
271-00 271-00 5064°7 Au 
274:60 fe 0°0 4984 Tl 4981°6 (6) 
* 283-85 | Au No.9 |. 283-85 4792: | Au 
286-65 S 0-0 4738-5 Tl 4738-0 (6) 
301-00 Au No. 10 301-00 4488-4 Au 
307°65 f. 0:0 4385°0 Pb 4387°3 (9) 
312°20 Au No. 11 312°35 4315°4 Au 
330°90 Au No. 12 301-15 4065:2 Au 
331-40 -M. + °25 4059-0 Pb 4058-0 (10) x 
339°65 °M + °25 38962°0 Al 3961°7 (9) wv 
341°20 f + +25 3944:0 Al 3944°2 (9) w 
345°03 Au No. 18 345°55 3898-0 Au 
357°15 Ss) + °25 3714 Tl 37759 (20) 
362790 f + °25 3719 ? 
367°90 °“M + °35 3672 Pb 3671°7 (8) 
371°65 °“M + °3d 3639 Pb 3639°7 (10) x 
377°80 Au No. 14 378°25 3686°7 Au 
384°70 S + °45 3530 Tl 3529°6 (10) 
386-00 S + -45 3519 Tl  3519°4 (20) 
404-05 Au No. 15 404°25 3383°0 Au 
419:00 Au No. 16 419°35 3280°8 Au 
420-10 S + °85 3274-0 Cu 82741 (6) ¥ 
424-30 S + °35 3246-0 Cu 3247-6 (10) w 
497-10 S + °35 3228-5 Tl 32299 (6) 
