ee a oo) a 
Hl. A. Hazen—The Shin Glows. 201 
respondence with the results found by Hartley and ourselves, 
which calculated for comparison up to 100, are as follows : 
Rhabdophane,* Scovillite. Theory. 
an 26°26 29°10 28°40 
E203) ; 9:93 1112 
(La, Di)sOs | ee 53°82 53°28 
Fes0,, i!) 
H,0, 799 6°86 7°20 
100-00 100-00 100-00 
Of the Cornish mineral it is stated that only four specimens 
are known, and these are from old collections made in Corn- 
wall prior to 1820. It is a very interesting circumstance that 
this rare hydrous phosphate should be found in this country, 
ose here also only a few specimens have thus far been 
obtaine 
Arr. XXV.—The Sun Glows ; by Henry A. Hazen. 
(Read Feb. 16th, before the Philosophical Society, Washington, D. C.) 
THE recent brilliant lighting .up of the skies after sunset 
4nd before sunrise have attracted universal attention, mingled 
) 
26, 1883, into the atmosphere from the Straits of Sunda, and 
f t these glows have been due to the diffusion of this gas, and 
‘urthermore that this gas has so enveloped the earth as to keep 
a Summer warmth, so that a mild winter has resulted. 
The ined unusual nature of the phenomenon, calling 
the theory that the earth in its orbit has encountered a stream 
of minute meteors or a cloud of cosmic dust, and that the glow 
* Hartle & A ‘ te) . 
V8 analysis gave (Ce, La, Di, Yt,),03 61°69, P20; 24°64, AlzOs, FesOs, — 
= 0, MgO with so e P.O; ae Si, 3°76, combined H.0 7-50=99°52. The 
excludes 5-69 impurities, loc. cit., p. ther analyses are given in the 
ae ee One of which 23-19 per cent. cerous oxide, and 2-09 yttrium oxide were 
2 SS Sour. Sc.—rarns Serres, Von. XXVII. No. 159.—Mareon, 1884. 
