Miscellaneous Intelligence. 237 
the series of specimens, even when several inches across, are 
plainly pseudomorphs after chrysolite, amphibolite, augite and 
titanite ; and that these pseudomorphs so abound in the matrix 
that they constitute the largest portion of the mass, and may be 
easily separated by u blow of the hammer. 
6. The Rumford Medals.—At the last annual meeting of the 
American ‘Academy of Arts and Sciences held in Boston, May 30th, 
1871, the Rumford premium was awarded to Mr, Joseph Harrison, 
Jr., of Philadelphia, “for his method of constructing steam boilers, 
y which great safety has been secured.” According to the direc- 
Tn 1839 to Dr. Robert Hare, of Philadelphia, for his invention of 
the compound blow-pipe and his improvements In galvanic 
apparatus. : , 
In 1862 to Mr. John B. Ericsson, of New York, for his caloric 
ne. ; 
In 1865 to Professor Daniel Treadwell, of Cambridge, for his 
_ _ improvements in the management of heat. 
In 1867 to Mr. Alvan Clark, of Cambridge, for his improvements 
in the manufacture of refracting telescopes, as exhibited in 
his method of local correction. f 
In 1870 to Mr. George H. Corliss, of Providence, for improve- 
ments in the steam engine. 
It was directed by Count Rumford that the premium should be 
ven “to the author of the most important discovery or useful 
Ht published by Nery or 
With which the Academy found it im ossible, or at least very inex- ' 
pedient, to comply literally, and for this reason the premium was 
hot awarded during a long series of years. The Academy is now 
3 
