Miscellaneous Intelligence. 443 
e obtained Pete in a perfee ay. pure state by simply 
g it in hot water until well softened, and then Sebllings it out into 
thin sheets, when, as | have before said, all foreign matter can be easily 
removed. I would recommend that the manufacturers at home should 
at the time of being collected, when they will receive the gutta ina 
state that will save them a vast deal more in trouble and expense than 
the eng addition necessary to the original prime cost. 
pencer’s Microscopes.—We have a more recent letter from 
Prof. Bailey than those published in our last ts (page 285,) ar 
ing the results of late observations with Spencer’s lenses. Prof. 
ley says: Foreign eta might ws estimate correctly our pa 
omy statement in your last a? Spencer 
SO Ss on 
a 7 they will appeal his merit when they learn that 
; s of the Navicula Spencerii, are more minute than 
s on any variety of the N. 7 eg which I have 
tlish writer states that not one glass in five hundred will 
‘show in a satisfactory manner the three sets of lines on the variety E. 
of the ee : hippocampus. Specimens agreeing perfectly with 
the desc of this variety occur in the Hudson River, and on these 
the three sets at once. Indeed the diagonals on this 
state, that by ee er’s lenses I can with ease 
: aoe pte lines on the latter species, which lines as far 
— rege of all tests for high powers. 
OBITUARY. _ 
Dr. Thomas P. Jone _—The sett ——— of 
Mtains the following ‘eee of a gentleman who was ex- 
own throughout the country, and universally respected and 
estee 
The Posies of this gentleman has been made known through the 
public prints, but no extended notice of his life and labors has yet ap- 
eared. We hope to see one from a pen capable of doing him full 
Justice, while, in in the mean time, our own shall re some 
tio ; 
ties and public trusts, — ae nearly fon 
Suitable acknowle edgment from his survivors an od many fr 
as long ranked high as a man of serees! science, pe he biome is o< 
debted to him for two of the best treatises on Chemistry and Mechani- 
Deters Serres, Vol. V, No. 15. —May, 1848. 
