566 



Mr. Savido-e and Prof. Nicholson on the 



Table II. « = 4"0 to * = 2l-0. 



OL. 



a\ 



a. 



; 



OL. 



~7-0~ 



.r. 



1-978 



a. 

 \ 



X. 



4-0 



1-581 



5-5 



1-797 



14-5 



2-626 i 



4-1 



1-597 



5-6 



1-slO 



7'5 



2-032 



150 



2-660 j 



4-2 



1-612 



5-7 



1-823 



8-0 



2-085 



15-5 



2694 



4-3 



1-628 



5-8 



1-836 



8-5 



2135 



160 



2-727 



4-4 



1-643 



5-9 



1-848 



90 



2-183 [ 



16-5 



2-759 



4-5 



1-658 



60 



1-861 



9-5 



2-230 j 



170 



2790 



46 



1673 



61 



1-873 



10-0 



2-275 \ 



17*5 



2821 



4-7 



1-687 



6-2 



1-885 



10-5 



2-318 j 



18-0 



2-852 



4-8 



1-702 



6-3 



1-897 



110 



2-361 j 



18-5 



2-882 



49 



1-716 



6-4 



1-909 



11-5 



2-402 1 



190 



2-911 



5-0 



1-730 



6-5 



1-921 



12-0 



2441 



195 



2 940 



51 



1-744 



6-6 



1-932 



12-5 



2-480 



20-0 



2-968 



5-2 



1-757 



67 



1-944 



130 



2-518 



20-5 



2-996 



53 



1-771 



6-8 



1-955 



135 



2-555 



i 21-0 



3-02;; 



5-4 



1-784 



69 



1-967 



14-0 



2-591 







Table III. *=21-0 to a = 80-0. 



ex. 



*' 



"• 



X. 



a. 



X. 



ex. 



.r. 



21 



3023 



36 



3-700 ! 



51 



4-208 



66 



4-624 



22 



3-077 



37 



3-738 j 



52 



4-238 



67 



4-650 



23 



3129 



38 



3775 



53 



4-268 



68 



4-675 



24 



3-180 



39 



3-811 



54 



4-297 



69 



4-700 



25 



3-229 



40 



3-847 i 



55 



4-326 



70 



4724 



26 



3-277 



41 



3-883 



56 



4-355 



71 



4749 



27 



3-323 



42 



3-917 ! 



57 



4-383 



72 



4-773 



28 



3-369 



43 



3-952 



58 



4-411 



73 



4-797 



29 



3-414 



44 



3-985 ! 



59 



4-439 



74 



4-821 



30 



3-457 



45 



4-018 



60 



4-466 



75 



4-845 



31 



3-500 



46 



4-051 : 



61 



4-493 



76 



4-868 



32 



3-541 



47 



4-083 



62 



4-520 



77 



4-891 



33 



3-582 



48 



4-115 



63 



4-546 



78 



4-914 



34 



3-622 



49 



4146 



64 



4-573 



79 



4-937 



35 



3-661 



50 



4-177 



65 



4-599 



80 



4959 



When a is greater than 80, the formula 

 *:=(2«)4-i+$(2*)-* 



may be used with a sufficient degree of accuracy. 



As an illustration of the use of the Tables, we may take 

 three successive lines in one of the triplet series of oxygen,. 

 whose wave-lengths are 



X 1 =6158-4 J \ 2 = 533083, X 3 = 4968'94, 



and wave numbers 



111=3 16238-0, «,-=18758-8, ?> 3 = 20125-0 



