Practical Talks by an Astronomer, by Harold Jacoby 53396 [Link: http://www.gutenberg.org/5/3/3/9/53396 ] [Files: 53396-0.txt; 53396-h.htm] Thanks to Chris Curnow, John Campbell and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) David