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After his death in 1948, the voluminous correspondence of the brothers and their note-books eventually came into the possession of the United States Library of Congress, and it is from this material that the present volumes have been compiled… The second volume contains later experimental work; but is largely taken up with the efforts made by the brothers, sometimes separately and sometimes together, to obtain some reasonable financial recompense for all their work by selling their invention to governments or private companies, a matter in which they met with no small difficulty.
A. et al. PLoS Biol. 2, e260 (2004). 10. Bernard, P. & Allshire, R. Trends Cell Biol. 12, 419–424 (2002). 7 highlites 522 NEW MH 26/7/04 2:57 pm Page 522 research highlights Astronomy Light-bending reveals stellar mass Astrophys. J. org/abs/astro-ph/0405124 (2004) It’s not easy to deduce a star’s mass. At present, it is usually done indirectly, by using spectroscopic measurements to determine the star’s radius and surface gravity. Direct mass measurements are possible for binary stars via their orbital parameters, but the only single star for which a truly direct mass measurement has been made is the Sun.
80 that matched the whisper call’s dominant 4. Sherman, P. W. Science 197, 1246–1253 (1977). 60 frequency and an audible call) to recipient 5. Hare, J. F. Anim. Behav. 55, 451–460 (1998). 6. Koeppl, J. , Hoffman, R. S. & Nadler, C. F. J. Mamm. 59, 40 free-living squirrels at a site that was 60 km 677–696 (1978). 20 from the recording site. Receiver vigilance 7. Pye, J. D. & Langbauer, Jr, W. R. in Animal Acoustic 0 Communication (eds Hopp, S. , Owren, M. J. & Evans, C. ) was scored (for methods, see supplementary Background Whisper Tone Audible 221–250 (Springer, Berlin, 1998).
Nature (Vol. 430, No. 6999, 29 July 2004)
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