NovEMBER 10, 1899. ] 
or more with the Willard 6-inch lens, and 
the asteroid identified on the negative by the 
trail caused by its proper motion. It was 
then observed with the 12-inch telescope. 
All but two of the Watson asteroids (or 
three, counting the one that is ‘lost ’) have 
been rediscovered and observed in this 
way. From three to five observations have 
been made of each. In the course of the 
work Mr. Coddington discovered two new 
asteroids ; (439) Ohio, and (440). 
Thirty-seven observations of ten other 
asteroids have been made by Mr. Codding- 
ton, seventy-nine observations of five as- 
teroids by Professor Hussey (including 
sixty-five observations of the new planet 
Eros), and ten observations of two as- 
teroids by Mr. Palmer. 
THE 64-INCH MERIDIAN CIRCLE AND THE 
44-INCH TRANSIT INSTRUMENT. 
The Meridian instruments are in charge 
of Professor Tucker, who is assisted by Mr. 
Crawford. The transit instrument has been 
little used, as the clock corrections for the 
time-service have been furnished by the 
meridian circle. 
During the year ending September 1, 
1899, 6,000 observations on 106 nights have 
been made with the meridian circle, mostly 
of southern stars from the catalogue of 
Piazzi.. In addition to these, observations 
for a study of the refraction were made 
during two months by Mr. Crawford, who 
has also been regularly employed in 
computation. The reductions have been 
carried through the early stages for all the 
observations of the Piazzi stars, and have 
been completed for about 1,000 observa- 
tions. A few miscellaneous observations of 
comparison stars and asteroids have also 
been made. 
The manuscript of the meridian circle re- 
sults from 1898 to 1896, forming volume IV. 
of the Publications of the Lick Observatory, 
has been sent to the State Printing Office. 
SCIENCE. 
669 
THE OROCKER PHOTOGRAPHIC TELESCOPE 
(SIX-INCH WILLARD LENS). 
This instrument, in charge of Mr. Cod- 
dington, has been employed mainly in the 
re-discovery of the Watson asteroids. Pho- 
tographs have also been made of nebula, 
and of comets 1899, a (Swift) and 1898, X. 
(Brooks). 
THE FLOYD TELESCOPE, AND SIX-INCH POR- 
TRAIT LENS. 
These two instruments, which are carried 
by the same equatorial mounting, have 
been in charge of Mr. Palmer, who has 
employed them, at such times as could be 
spared from other duties, in photographing 
the extended nebulosities of Herschel ; 
also, in photographing other nebulous re- 
gions, in connection with the work of the 
Crossley reflector. Photographs were also 
made of comet 1899, a (Swift), and 1898, 
X. (Brooks). 
THE BRUCE 64-INCH COMET SEEKER AND THE 
4-INCH COMET SEEKER. 
The comet seekers, in charge of Mr. 
Perrine, have been constantly employed. 
For two months during the past summer 
they were used by Mr. Crawford. 
The comets discovered at Hamilton dur- 
ing the year ending September, 1, 1899 were 
Comet, 1899, IX. (Perrine), September 12, 1898. 
Comet, 1899, c (Tempel, II.), Perrine, May 6, 1899. 
Comet, 1899, d (Holmes), Perrine, June 10, 1899. 
In the year ending September 1, 1898, 
six comets were discovered at Mt. Hamilton. 
THE PHOTOHELIOGRAPH. 
Two photographs of the sun are taken 
with this instrument every clear day, and 
the negatives are stored for future reference. 
The work has been done by Mr. Pauli, the 
Janitor. 
THE SEISMOGRAPHS. 
The seismographs, in charge of Mr. Per- 
rine, are always kept in adjustment. A 
