90 Correspondence of J. Nickles. 
than diabetes, the symptoms of which he first felt in 1854. He — 
then retired to the country, and for three years lived at Fontain- — 
bleau, dividing his time between painting and astronomy. To- — 
ward the latter part of last August his disease became compli- — 
cated with other difficulties. He hastily finished his papers upon — 
the physical constitution of the sun, and died on the 20th of — 
August. He leaves a widow and two daughters without for — 
tune. They will doubtless be adopted by the “Société de Se _ 
cours Amis des Sciences.” ‘i 
by the vapor of water. By means of new optical dispositions 
of fine 
In Sep- ~ 
tember, 1864, from the summit of the Faulhorn, he observed — 
the rays of terrestrial origin and found they became weak in — 
