480 PROCEEDINGS OF THE AMERICAN ACADEMY. 



changes in latitude occurred according to two superposed oscillations, 

 one of fourteen months, the other of a year. With this key he un- 

 locked many mysteries of the past. His work harmonized the Wash- 

 ington observations for latitude. He "added a hundred feet to 

 Bradley's monument," and showed that Pond's apparent errors at- 

 tested the excellent quality of his observations. Variation of latitude 

 explained also the difficulties experienced by Airy with his Reflex 

 Zenith Tube. 



For these researches he received in 1895 the Watson Gold Medal of 

 the National Academy of Sciences, and in 1896 the Gold Medal of the 

 Royal Astronomical Society. The latter was given also in considera- 

 tion of Chandler's work on variable stars. These objects were a 

 favorite study of his. Three successive catalogues of variables, pre- 

 pared by him, may be mentioned. 



He was editor of the Astronomical Journal from 1896 until, on 

 account of ill-health, he resigned and became associate editor in 1909. 

 Among his numerous activities. Chandler was interested in the trans- 

 mission of astronomical intelligence by telegraph. He devised the 

 " Chronodeik " for determining the time. He studied cometary orbits, 

 and made computations which led to the discovery, in cooperation 

 with the Harvard Observatory, of the position of the small planet Eros 

 on photographs made at the observatory four years before the planet 

 was known to exist. 



Chandler was elected a Fellow of this Academy in 1883. For his 

 Almacantar he was awarded in 1884 the medal of the Massachusetts 

 Charitable Mechanics Association. He received in 1891 from De 

 Pauw University, Indiana, the honorary degree of LL.D. He was a 

 member of the National Academy of Sciences, and a Foreign Associate 

 of the Royal Astronomical Society. He was a member of various 

 other scientific associations. For many years he served efficiently on 

 the Gould Fund Committee of our Academy; also on the Bache Fund 

 Committee of the National Academy. 



Dr. Chandler possessed what may seem unusual in a scientific mind, 

 keen business judgment. He was able to gauge the underlying 

 financial conditions accurately, so much so that his advice in such 

 matters carried weight with friends engaged directly in the business 

 world. This was of great service to him in his affairs relating to 

 trusteeship, the duties of which he faithfully and efficiently discharged. 



