146 
SEE. 
be said to confirm, though it does not finally establish, the 
value now in general use. 
One of the greatest of modern astronomical campaigns has 
been in progress for some months for the determination of 
the solar parallax by the observation of Eros, which came 
within about 27,000,000 miles of the earth and had a hori¬ 
zontal parallax of about 28". By taking observations at both 
ends of the night the parallactic displacement could be in¬ 
creased to about 36" for a station on the parallel of Washing¬ 
ton. This is four times the amount of the solar parallax, and 
hence errors of observation are greatly diminished in the 
final result. The International Committee, with headquar¬ 
ters in Paris, issued instructions to all the observatories par¬ 
ticipating in the Eros work, and some fifty observatories in 
Europe, Asia, America, Australia, and Africa have been occu¬ 
pied with the necessary observations. 
Measures with the micrometer, heliometer, and by pho¬ 
tography have been made, and it is hoped that the discussion 
of the work, which will probably occupy several years, will 
materially improve our knowledge of the solar parallax. 
The eclipse of May 28 was observed with general success 
throughout the world, and especially in the United States. 
The corona proved to be unusually large and symmetrical, 
and was magnificently depicted in the photographs obtained 
by numerous parties. As yet the results are in the main 
unpublished, and no very significant discovery has followed 
from the eclipse observations. Considerable experience was 
gained which may be of use in the coming eclipse in the 
East Indies, which will be observed by a large party from 
the United States and by others from European observa¬ 
tories. 
In the line of Stellar Astronomy mention should be made 
of the discovery of several hundred new double stars by 
Professors Hussey and Aitken at the Lick Observatory. 
Professor Hussey has been occupied for several years with a 
general survey of all of the Otto Struve stars, and while 
doing this and other work he has discovered more than 350 
