160 Obituary. 
are wholly above the piers, and the steadiness of the whole instru- 
ment is increased. a advantage of this arr angement 
eatact hows be discussed ; s been tested by five years’ ex- 
rience at Harvard ollars Oterreatory with very gratifying 
results ; it has been adopted i in other observatories, and will proba- 
bly come into gene 
(2.) Thea épphoatich of a 1 diagonal eye-piece, moved by a rack and 
pinion, to any large telesc ope, in such a manner as to 5 
with the customary “ finder,” and to enable the principal object 
glass to be used in finding faint objects which are to be examin ed 
with the spectroscope or otherwise. This invention has also been 
: e use of a lens of long focus and of a plane mirror in mak- 
ing photographs of the sun. Apparatus of this kind was brought 
nto mags use in July, 1870, = Harvard College Observatory: 
Winlock first photographed the solar corona without enlarging the 
image by an eye-picce 
During his ¢ connection with the Observatory, Professor Winlock 
acai Sagara: 2 instrumental equipment, and also its pecuniary 
res y the of contributions from neighboring friends of 
science. am particular, the system adopted for furnishing electric 
signals from one of the clocks at the Observatory to various points 
in Boston and elsewhere e, has been profitable alike to the Observa- 
tory and to the public. = illustrates Professor Winlock’s prac- 
tical good sense, that instead of introducing new clocks, con- 
ception of the sidale every tw ds much beer 
than the other, and in practice Ps srt satisfacto 
In private life, Professor Wi oe though reser vers 
fift; 
The most important of the labors ‘of "the aistngriehed astron- 
omer were the construction of two catalogues, the one of nebulz 
ae tf him at Leipzig, the other of nearly 2,000 nebulx ob- 
rved by him at Copenhagen. For these observations the Royal 
Aecinaioal Society of London pat to him this year their 
gold medal. 
