Publications of the University of Pennsylvania Volume 4, pts. 1-2 ; Astronomical series
(This historic book may have numerous typos and missing te...)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...322?15 6T01 9.0 9.0 R 4 1910.060 320.95 6.16 9.4 9.4 R4 1910.04 321?6 6T08 9.2 9.2 2 I can detect no difference in the magnitudes. But one prior measure. There is no evidence of change. 4538. ß 102. 1909.000 117?91 3T23 6.5 11.0 P 4 1909.003 120.69 3.38 7.0 10.5 P 4 1909.014 120.20 3.40 7.0 10.5 P 4 1909.01 119?6 3T34 6.8 10.7 3 No measures since 1892. Apparently fixed. 4547. 21213. 1909.000 319?o9 6T68 9.0 10.5 P 4(a) 1909.049 319.43 6.80 9.0 11.0 P 4 1909.074 318.06 6.94 9.0 11.o R4 1909.04 318?9 6T81 9.0 10.8 3 (a) The small star is much brighter than 12.0 magnitude. For many years the pair appeared to be fixed, It is therefore evident that there has been a but it is now certain that the angle and distance 1910.43 143?4 oT86 9.4 10.3 There is but one prior measure: 1900.30 128?1 1T02 9.0 10.0 3n, Hussey. decided and interesting change. are both decreasing. 1907.80 169?3 1T82 9.3 9.4 3 But one prior measure. Apparently fixed. 4644. H 788. R.A. = 8h 23m 9"; Decl. = + 280 42' 1908.000 197?82 6T96 9.5 9.8 R 4 1908.003 198.76 6.80 9.5 9.5 R 4 1908.on 197.51 6.94 10.0 10.0 R 4 1908.00 198?o 6T90 9.7 9.8 3 There is a 12 magnitude star in the position 145, 20"±. The star is DM + 28(161s), 9.3 magnitude, from which the position is derived. There are no prior measures. 4669. A.G. 153. 1911.044 93?82 2T88 9.0 9.0 P 4 1911.060 94.96 3.01 9.2 9.5 P 4 1911.05 94?4 2T94 9.1 9.3 2 But one prior measure. Probably fixed. 4695. Aitken 339. 1910.109 5?8з 1T94 8.0 13.0 R4 1910.134 10.07 2.11 8.0 13.4 R 6 1910.12 7?9 2T02 8.0 13.2 2 A difficult pair. But one prior measure. There is no trace of any change. 4717. Kustner 32. 1910.170 172?74 2T16 8.0 10.7 R 4 1910.175 171.63 2.20 8.0 10.0 R 4 1910.17 172?2 2T18 8.0 10.4 2 In the Praesepe. But one prior ...
The Secular Variations Of The Elements Of The Orbits Of The Four Inner Planets Computed For The Epoch 1850, G.M.T. (1912)
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Eric Doolittle was an American astronomer. He accumulated and published a great mass of double-star observations and his authority in this field was well recognized.
Background
Eric Doolittle was born on July 26, 1869 in Ontario, Indiana, United States. His father, Charles Leander Doolittle, was appointed director of the Sayre Observatory of Lehigh University in 1875. He lost his mother, Martha Cloyes (Farrand) Doolittle, the year the family moved to Bethlehem.
Education
Practically his whole life was spent in the atmosphere of an astronomical observatory. Eric became his father’s assistant and his successor as director of the Flower Observatory of the University of Pennsylvania.
He was educated in the public schools of Bethlehem and at the Preparatory School of Lehigh University and graduated from the University in 1891 with the degree of C. E. After spending one year as teacher in the Preparatory School, one as instructor of mathematics in Lehigh University, and two in a similar position in the University of Iowa, he went to the University of Chicago for graduate work in astronomy. He had already advanced himself in mathematics by private study and during his year of graduate work he showed great promise.
At the suggestion of his professor, the thesis which he had prepared as a requirement for the master’s degree was withheld as sufficiently meritorious for a doctor’s thesis.
Career
Doolittle did not complete the requirements for a doctor’s degree, however. Called to the University of Pennsylvania in 1896 as instructor in astronomy, he was placed by his father in charge of the new eighteen-inch telescope, made by Brashear, and especially suitable, by reason of its great focal length, to micrometric work. He at once threw himself into the observation of double stars. After working all night he often caught but a short nap before it was time to start for his classes at the University, five miles away. He never slighted his class work and was an enthusiastic and inspiring teacher. He accumulated and published a great mass of double-star observations, and his authority in this field was so well recognized that Burnham of Yerkes Observatory turned over to him the manuscript notes for the extension of the General Catalogue of Double Stars. Thenceforth Doolittle entered on cards, without any clerical assistance, all published observations of double stars. He also found time to finish an extensive work of computation, The Secular Variations of the Elements of the Orbits of the Four Inner Planets (1912), and to write many popular articles on astronomy.
During the World War, seeking for the most useful thing he could do, he spent much time studying to be a wireless operator until he was called upon to organize the United States Shipping Board Navigation School at Philadelphia. In attempting to teach large numbers of men and to attend to all the details of organization and administration, he broke down. Although he later returned to his regular duties, he never fully recovered. With a strong tendency to overwork and with an unusual ability to use his time profitably, it is a pity that he was given so much to do without liberal clerical and financial assistance.
Doolittle was a man of extreme modesty and self-effacement. He had a great gift for friendship, firmly based on complete unselfishness and consideration. The appreciations published after his death all show how much his friends loved him.
Interests
Writers
Dickens
Connections
In 1902 Doolittle married Sara Bitler Halliwell of Bethlehem. She was in full sympathy with his ideals and willingly endured the great sacrifices she had to make.