62 Scientific Intelligence. 
nearly to the limit of the blue and green is an appearance of the 
hird. The earths of samarskite as now known are given by the — 
author in the following tabular form: 
Name. Color. Molec. weight. ve length of RE: band. 
Yttria White YO ae (Peafontaine 
Erbia Rose KrO =130 (Bunsen-Cl 
Terbia Orange TbhO =114-115 (ielatoniaine-Marienac) 400 Donk 
Philippia Yellow PpO =90 about (Delafontaine) abou 
Decipia White ? pO =122 about (Delafontaine) 
Thoria hite ThO,=267- ( Non 
Didymia Brownish DiO =112-114 (Marignac-Cléve) 512-617 
ria Pale yellow 
He also calls attention to the numerical relations betwee 
the ee weights, thus: Yttrium=58; Philippium = 74 or 
58+2x8; Terbium 98 or 58+5X8; Decipium 106 ? or 38 L6X8 
and Gabe: 114 or 58+-7X*8.— C. &., lxxxvii, 633, — 1878, 
nm the New Element, Mosandrum.*—At a recent mookiins of 
the French Academy (Nove mber 25th, 1878), a note by Dr 
Lawrence Smith was presented, in whi ch he claimed for himsel 
riority in having been the first to call attention to the absence 0 
cerium oxide, and to the new characters of certain earths, in the 
North Carolina samarskite, and to have described one of these 
under the name Mosandr 
4, Un the New Klement, Yiterbium.—Marienac has described 
some of the compounds of a new element, found in the Ytterb, 
ed 
treating the mass with boiling screed an insoluble senidine renmainal 
im n which the erbium was concen rited. By repeating the operation 
ptio 
weight which at first kept scettied, finally separated ; the ato 
weight slowly increasing, while the rose color and the bands dimi 
ished ; so that the last sae was — white, its salts wer 
and erbium saa peters its crystal water at 100°. These the 
Mecinuriiak “it from thorium, the only element of this kind know? 
* This Journal, xvi, 384, November, 1878. 
