

Eminent Chinese of the Ch'ing Period is a biographical dictionary in English, edited by Arthur William Hummel, Sr and published in 1943 in two volumes by the Library of Congress of the United States.
In addition to scholarly biographies (in contrast to the official history in the Confucian tradition) of some 800—and by way of mention, several hundred more—individuals from the late Ming to early Republican period, they are particularly valuable for many succinct passages that provide background information on Chinese philosophy, art, mathematics, etc., of earlier periods.
Contributors include
Similar projects have been undertaken for other dynasties, most notably:
More than half a century after its publication, ECCP still is a valuable work of reference for Qing biographical information, and may serve as an introduction to Qing history in general. Patricia Buckley Ebrey at Dartmouth is leading an ongoing project to digitize it, and everyone is welcome to help edit the text (using the About on the Geni profile), such as
In 2021, the FULL TEXT of ECCP appears to be available on wikisource, with much higher quality. We shall use this as the main source: https://en.wikisource.org/wiki/Eminent_Chinese_of_the_Ch%27ing_Period
When in doubt, consult the original at archive.org Vol. I, Vol. II
Note: The original text (in Wade-Giles) of Eminent Chinese of the Ch'ing Period is in the public domain and may be freely reproduced. The html-coded pages at http://www.dartmouth.edu/~qing/WEB/ (UPDATE: it's moved to http://www.suduri.net/ECCP/WEB/index.shtml) and the programmed pages for ECCP READER are © Tonseth House Studios 2016.