396 Obituary. 
tory, especially conchology, in 1826, when he built a yacht for the pur- 
pose, and undertook a cruise of more than a year’s length among the 
islands of. the South Pacific. Returning to Valparaiso, he prepared for 
exploraticns along the western coast of southern South America, where he 
continued. for two years collecting in all departments of zoolo In 
1835 he started on a new expedition of four years to the Philippine 
Islands, and made there vast collections in botany and zoology. During 
the twenty-five years since his return from the East Indies, he was occu- 
pied mainly with the arrangement and extension of his collections. He 
had long been subject to chronic apace ine and an asthmatic affection, and 
these were finally the occasion of his death From a notice in Athen. : 
Aug. 19. 
Jowann Franz Encxe.—Encxe, the Director of the Berlin Observa- 
tory, died at Spandau, on the 26th of August, 1865. He was born on the 
23d of September, 1791, at Hamburg, where his father was a clergyman. 
Wiutam Rowan Hamrirox.—Sir Wm. Rowan Hamilton, Astrono- 
mer Royal for Ireland, died on the 2nd of September, at the age of 
sixty. He became known as a mathematician of extraordinary genius 
when he was about twenty years old. 
His papers on systems of rays, on the methods of dynamics, on alge- 
bra looked at as the science of pure time, on discontinuous functions, on 
equations of the fifth degree, and his new algebra, the Quaternions, can- 
popularized. But there is one little result of which an idea can 
on 1 being faked for under the proper ie cians by Prof. Cee — 
ce a pg “eh exist. eee such a non had e' er been even _— 
eae was a man of very Wide Sait and vy varied talents ; “he 
was a scholar, a metaphysician, and a a poet. He was beloved for the 
kindness of his heart, and is 2 for the integrity ae his character.— 
From a notice in Athen., 
Joun T. Piumuer, M. D. carte _ Plummer died on the 10th of April, at 
his 8 residence in Richmond, Indiana, aged 58 years. He was a graduate 
ies. ; A Behoo ey "College in 1828. While sie making 
“onal sedans: his special study, he made collec 
ons in different departments, and formerly coast short 
papers to the | pages of this Journal, and to those of the Journal of Phar- 
macy. He was a member of the e Society of Friends (Quakers), and onieek 
best of men. He wa 
= to an extreme, He has i ee manuscripts, the la naar me 2 
f which relate to . the Said of Friends, of which he was one of the 
Amost influential members, 
