300 Mr. G. A. He*msalech and the Comte de Gramont on 



b. Uviol spectrograph X 3170 to 5000. 



XX 3221") 

 3240 



3263 ^Characteristic arc lines which disappear in water arc. 

 4341 

 4603J 



3787 Spark line ; absent from carbon arc, feeble in direct 

 arc and appreciably enhanced in water arc. 



Reversals. 



XX 2237 Reversed in water arc, but not in direct arc or spark. 

 2247] 



2394 [ Eeversed both in direct arc and water arc ; not 

 2614 1 reversed in spark. 

 2833 



d. Glass spectrograph X 3600-X7000. 



Wave- 

 lengths 



Ordinary arc 









in air between 



Carbon cathode 



and 



Lead anode. 



Arc between Lead poles 



in 





in 

 LA. 



Nitrogen. Oxygen. Coal gas. 



Liquid air. 





3683-5 



10 crb rv 



10 crb rv 



4cr 



3 cr 



5cr ■ 





3740-0 



10 c 



10 c 



6c,ratpoles 



5 cb rT 



8cs 





3786-3 











■ — - 



00 dd nn 







enh. 



4019-6 



10 c 



8c 



10 c 



10 c 



10 cs 





4057-8 



20 crb rv 



25 crb ry 



30 crb rv 



50 crb rv 



30 crb rT 





4062-2 



4c 



5c 



4c 



8c 



5cs 





4168-0 



8c 



6cs 



8c 



7c 



8cs 





4242-6 







Oddnn 



fdn 



2dn 



OOddn 



enh. 



4245-2 



* 



f 2 nn in I 

 { 1 n in II 



4d,b^inl 



f 15 b rT in I 

 \ 10 in II 



f 5 in I 

 1 1 in II 



enh. 



4340-6 



4c 



2 en 



Ocn 



|cn 



2c 





4386-9 







f 2 nn in I 

 1 in in II 



J 5b rv inl 

 [3 in II 



/15 b" in I 

 [ 10 in II 



5d 



enh. 



5005-4 



12c 



- 8c 



8cs 



8c 



8 cs 





50430 







Oddnn 



dd nn 



f 2 n brv in I 



\0nb^inII 



3c 



000 dd 



enh. 



5201-4 



10c 



5c 



4cs 



4cs 





5372-5 







J 2 nn in I 

 [ 00 n in 11 



/3inl 

 \0in II 



/ 10 b rT in I 

 1 1 in II 



ldd 



enh. 



5544-8 







f 1 nn in I 

 [OOOninll 



/2ninl 



\00ninII 



f 3 b rv in I 

 1 i in II 



iddn 



enh. 



5608-9 



— _ 



flOinl 



{ 3 in II 



] 10 in I 

 \ 5 in II 



J 15 b rv in I 



| 1 in II 



/6inl 

 \2inII 



enh. 



' 5876-4 















% dd nn 







enh. 



6002-0 



4c 



6c 



4 en 



3cb r 



5cs 





| 6011 



2c 



2 en 



2cnb r 







2 en 





6059-9 



2c 



1 en 



0cnb r 



00 c 



io 





6109 



|C 



00 c 



000 en 







000 c 





6234 



lc 



0c 



00 c 







00 c 





6660-0 



— 



1 2 in I 

 1 00 in II 



f5inl 

 1 1 in II 



J 8 in I 



1 1 in II 



flinl 

 1 000 in II 



enh. 



