404 Scientific Intelligence. 
Sodium 
SP lees Feb. 28, 1869. 
arium. 
1989°5 Kirchhoff’s scale, March 14, 1869. 
31° - Fetes Weg apc July 5, 1869. 
Magnesium. 
b 4, 2.3, 4, Feb. 21, 1869. 
June 6, 1869. 
“cc 6c 
Tron 1474, 
? 15° 
515°5, 
A brilliant ray 1529°5, .....----- 
2 1567°5, 
9 46188. os. June 6 
Iron 1867-0, 
A brilliant line 1871°5,.......... 
Iron 2001°5, aeckerouaee «“ 
P MUOOM fei ct aut wcis Seen * 9 
Band or lines 2054°0,.....-- Jialy8;;,:-4 
— Comptes Rendus, \xix, 121. 
is SPF le to Naat eer SET cS EN ROT ne Pepe caer Sener aa ete EE Sg ie 
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ent. 
that the six principal rays of sodium observed by Wolf and Diacon 
are all double, and that the two rays of each group are at about 
the same distance as those of D. esium, as is well known, 
gives the group of 3 rays b. In the ultra violet spectrum of the 
same metal there are two other remarkable groups. 
518-2, 386-4 and 333°5, The author thinks that this repetition of a 
the same phenomenon in different parts of the a EEE cannot be 
the result of chance, but depend on the molecular const 
the luminous gas.— Comptes Rendus, \xix, 337. 
6. On the urora 
| uf the 
on p. 123 of vol. xlviii of this Journal, it is stated that 5 Hm 
were seen. For 5 we should read 7, the places on Mr. Huggins 
tia 
