\ 
198 
W. Gibbs on the wave lengths 
By means of Table III the wave lengths of all the lines 
upon 
Mr. Huggins’s scale between 
have been computed. Thes 
however not followed the order adopted b 
have put near each other as far as possible those clei which 
form members of natural groups. 
C and scale-number 
ese are given in ioe I 
T have 
uggins, but 
Taste IV.* 
NITROGEN. H A a H vt 
H 2 2205 5 486°18 2181 5 487-56 1169 2 569°46 8 
6295 ¢ 649°08 2221 3 485°30 2213 3 485-74 1174 1 66890 8 
807 9 618'45h.d 2305 ¢ 480°84 2502 7 47033 n 1746 1 515900 
959 4 595°33 2336 1 479-08 9512 7 469°84 n 1753 5 515370 
967 ¢ 594°26 2350 7 478-29 2563 5 467-38 n 1991 498°87h 
975 4 593-20 2 9 463°78d 2597 5 465°82 n 
978 1 592-80 2669 3 462°60 2626 2 464°5 THALLIUM. 
1100 5 677°53 2689 1 461°74 2642 2 463-78 d a 
1118 4 575°37 2707 1 460°97 2748 1 459-27 596 4 655°32 8 
1135 ¢ 673°37 2722 1-5 460°35 2766 1 458°54 %68 1 62401 b 
1150 9 571°64 2738 1-5 459°68 3086 44675 h 921 2 600768 
1171 1 569°24 56 454-96 3238 1 445-03 n 960 6 595208 
1177 3 568°55 2904) 453°15h 3241 1 441-75 n 1055 2 583-028 
1180 1 568°21 rs 450'46h 3395 1 48685 n 1099 5 577652 
1187 7 567: 3009 1 449°37 3456 2 435°00 n 1366 1 549°07 8 
1294 » 555°56 3011 1 44931 3560 1 431-95n.d 1505 9 535648 
1302 5 554-71 3056 «= 447°76h «0938710 «42787 Hh «1747 4 51592 
1310 1-5 553°85 31 444°83d 4059 1 419-29 1851 4 50827 2 
131455 553°37 3174) 443-86h 87 1 418-65 1885 1 50591 8 
1319 9 552-91 ais 442-43h 4232 41543 1999 2 49836 b 
1349 1-2 549-7: 3292 440/11 a 2 412-01 2146 2 495-448 
1366 1 548-04 3456 99 4615 1 40782 n 2379 2 476700 
1383 5 3 386 423'99h 4639 1 40731 n 37 4 47361 2 
1394 7 545-43 3991 420°90h 3 3 4110162 
1502 2 53681 4145 417-34 Potassium. 
1516 2 5345 4263 414-75 n LitatuM. 
1537 2 53269 4330 413:34h 727 5 630°85.s a 
1713. «618-39h 4473 «= 410-45 n S40 - > or 856 3 61073 § 
1718 51801h 4505 1 40982 n ,ftn PBIB S 9013 2 bert 
Ft, tere rental Seger ae a ee 
& 
1900 3 504-88 073 15 580°80 n SILVER. 
1941 5 602-12 OxYGeEn. 2200, & 4581 690 2 63748 
1951 5 501-46 H S325 F 25806 S -- 1gg. 5 CORE 
106s SUE. gor s Giedsha come came 809 5 sue 
1967 y 500-42 1699 3 51947408 22 41877 n 1031 a 58003 5 
1978 5 499-71 1737 3 516:57% Soprum. 1207 5 56519 2 
1990 3.498°94 2043 5 495-61 H a 1223 4 563°42 2 
2079 5 49343 = 2060 7 494-58 818 1-5 616-72 3 1227 7 56300 
2140 5 489" 2089 5 821 1 61656 s 1240 3 561°46 § 
168 5 488 S18: 7 491-07 1000 8 590-04 s 1257 559°5T § 
2192 3 486°96 5 489° 1005 8 589-43 s 1276-35 55746 § 
stduaride thax tls scale numbers give the i 
intensities of the spectral ins upon an scale. ey way s, n, b and 
wing Significations ; s, a sharply defined line, narrow when the 
; 2, a line with edges even slit is narrow; 2S 
Ses toe wot reosivatio ie tenets } aanietorha mente measurement 
