L. P. ~W heeler — Dispersion of Metals. 



501 



or. 



-&2£*iSl2 



(2n — 1) {In — 3) 



(2a)' 



i].W 



These integrations were first performed by Nicholson.* I am 

 unable, however, to confirm his values for the numerical coef- 

 ficients in the expansions, but find them as given above. 



Table V — Cobalt. 



Observer 



Minor 



Tool.... 

 Minor .. 

 Tool.... 

 Minor .. 



Tool..!! 

 Minor . . 

 Drude _ . 

 Tool.... 

 Minor .. 

 Drude .. 



Tool 



Ingersoll 

 Tool.... 

 Ingersoll 



0-231// 

 •298 

 •347 

 •395 

 •420 

 •450 

 •480 

 •500 

 •550 

 •560 

 •589 

 •589 

 •600 

 •630 

 •630 

 •640 

 •65 

 •680 

 •87 



1-25 



1-75 



2-25 



nk 



•79 



■86 

 93 

 05 

 2-09 

 2-12 

 2-12 

 2-21 

 222 

 2-22 

 2-34 

 235 

 2-50 

 3-18 

 4-50 

 553 

 5-65 



1-43 

 233 



2-47 

 2-91 

 3-07 

 3-42 

 3-41 

 3-71 

 3-90 

 3-81 

 4-04 

 4-04 

 4-03 

 4-19 

 4-19 

 4-26 

 4-40 

 4-44 

 5-37 

 6-30 

 6-81 

 7-18 



■/? 



(10)- 



127- 



132- 

 92-0 

 77-1 

 69-6 

 67-2 

 57-2 

 57-4 

 48-2 

 45-4 

 41-8 



41-3" 

 372 



37-8" " 



37-6 



35-3 



260 



14-6 

 7-03 

 3-56 



4-33 

 4-48 

 3-74 

 3-44 

 3-26 

 322 

 2-97 

 2-98 

 2-74 

 265 

 255 



2 V 53 



2-41 



2-43 



2-42 

 235 

 2-04 

 1-55 

 1-08 

 0-76 



n\tf—V) 



0-83 

 3-17 

 3-74 

 5-83 

 6-60 

 8-49 

 8-16 



10-0 



11-0 



10-1 



11-8 



Yl-4~~ 

 12-7 



~12 V 6~" 



13-8 



135 



18-7 



195 



15-8 



195 



18-3 

 32-0 

 35-2 

 42-0 

 44-9 

 50-8 

 53-3 

 57-8 

 64-1 

 64-5 

 68-4 



"70"-4 



73-8 



76-6 



78-3 

 83-1 



116- 



183- 



247- 



293- 



K 



17-7 

 28-9 

 31-5 

 36-2 

 38-3 

 42-3 

 45-1 

 47-8 

 53-1 

 54-4 

 566 



~5~9 V 

 61-1 



~6"4 V 

 64-5 

 69-7 

 97-6 



164- 



231* 



274- 



If we had made use of the average velocity of the electrons 

 instead of assuming the Maxwellian distribution, we should 

 have been led to the expression 



pma- a 





the real part of which is the formula given by Schuster and 

 Jeans. It is included here for the sake of a comparison of the 

 results of the two hypotheses as to the electronic velocities. 

 If now we write S, and S 2 for the two series in equation (4) 



Am. Jour. Sci. 

 35 



* Nicholson, loc. cit. 

 -Fourth Series, Vol. XXXV, No. 2( 



May, 1913. 



