Scientific Intelligence 



mm Goi 

 Palissya Brc 



12. Mi undo ■«>',• /..< <'<n-<irt;,-t* M 7 „,' r<d,,,, ;,,,,, * ,/ Stratigraph- 

 inues des Roches dites Plutoniennes de la Belgiqve tt d, F.lr- 

 detme Frangaise, par MM. Cu. De ta Vallee Poussin et A. 

 Renard. 264 pp. 4to, with nine plates, six of them ■ 

 colored figures of thin sections. A detailed account of the rucks 

 reierred to, based largely on the study of their sections. In the 



-t, the authors distinguished cubic 

 crystals in the liquid filling minute cavities in the quartz, and 

 proved the crystals to be chloride of sodium or common salt. 



13. Xott on tfo ,«-tr h„-alith« of tin <\d>iudd- arid ,.,;,., ,■■>/,; 

 '"" l hr " ">-"• <:»hi>, drifts; by J. Lawrkxi k Smith.— The lorality 

 f'*' ar -^ 1;l! ' i "", North Carolina, is now well known, a- 



large and fine specimens of Samarskite. It was doubted by some 



able by chemical analysis to establish hevond all doubt that it is 



a very fine type of this rare mineral (the "cause of the doubt I will 



refer to am ,g M ,-. K. s. Dana's conclusion, 



• :i : ,a » ' - ' ' 'i ' - ■ i« racter. In studying tin mineral, 



1 toiiii.l a-»ociate«l with it three other columbates— one of them 



md two new ones. One is in the 



form of a very characteristic mamillary concretion, and contains 



sixteen per cent of water. The other is found massive, and abo 



in regular octahedrons, of which a few have been found ; it resem- 



liifers from it both by its chemical 



avity being 4'85. The 



eral I saw about eight months ago, in the hands of Mr. 



.1. 1 nee Kalston, and then supposed it was new. He had sent a 



specimen to Mr. E. S. Dana, who gives some of its characters in 



»th his .•ry>tallograpic description of Samarskite, and 



refers it with a query to microlite. Since then Mr. Kalston has 



■ - rystals, and I have now made out its nature 



thoroughly. Ibe analy>b of it will appear in a b, 



paper on the American columbates. 



a to the above, I have discovered embedded in the 

 beautiful crystals of Amazon stone, from Colorado, very small, 

 perlect crystals of columbite. 



14. Bullet;,, „ r f,, /;,.,.,„ In*r,tHt;,., t% J„ lia dc« Plain, Boston, 

 t f."-" , N ': 1 ; 1 >-,l-''t I. 80 pp. 8vo. 1877,-Among the papers in 

 '1— are the following by Prof. V. U. 

 - 

 kinds of rocks ; o i I . _, , lt llve . woods and 



tan; on the composition of buck-wheat straw; on the 

 wW °1 T 8 ^ 1 leatll " r: ""^ "*" •■M-riment. in ■■ 



Frn P t n I Were " 8 of peat in alkalies. 



presence of Phosphates and Pot- 



'ii thai sewn oranites, all from eastern 



^S£%$2£3F t0 W34 p - c - of ^^ and °-° 58 10 



