154 Scientific Intelligence. 



Orthite occurs in imperfect blade-like crystals s< veral indies in 

 length. An -analysis gave: Si0 3 32-35, A1 8 3 16-42, Fe„C), 4-4$>, 

 Ce s 3 11-14, La 2 "0 3 3-47, Di 8 3 6-91, FeO 10-48, Mn(> 1-12, Ca<> 

 11-47, K 2 0, X;i,0 (>'-40, U 2 <) 2-:Vl = l(M)-(J2. Jlomizite also occurs 

 at tlu- sun. U ality in iii.i-i s of large size (up to 20 pounds) as 

 piwiouslv shown l.y K.mig (Proc. Ac. Nat. Soc. Phil., Jan. 24, 

 !ss L >). the analysis 1>\ 1 )unningtoii shows the presence of 18*6 



11. On the propagation of heat as determined by the <:r,j*t,ril'n,> 

 xtrnrtare <;/' mhieralx <t„d f,g th, nehixt<f«>. structure <>f forks.— 31. 

 •Iannkttaz has undertaken a series of experiments in the line so 



successfully follows! by Senaniiont, ami has obtained some new 



i, taking place less rei 

 ; of cleavage, than in 



i.'lilv in t'l 



a direction parallel to 



it"' Th 



.r.'.th. lanu-M: 





pply to pseudo-cleavao 



.lite. The, 



or and minor axes of tin 



ab .th 



■ is,. a he 



1 is character 



iates 1 l.i 



each group of minerals, e. g. tt 

 s group from others. In exper 



cks (when the schistosity : 



12. Mil>r,n<k,< ('/,/,/,• <n,d AV/c/x— Tho t 

 y Mr. E. T. Sweet of (I) the Milwaukee cl 

 nil-colored brick ; (2) of a clay from Madis 



urns red; and (3). of the Milwaukee brick. 



