fyfANY readers of KNOWLEDGE, in which Weekly 

 Paper an effort has been made to bring scientific 

 news and discoveries before the public in a cheap 

 and trustworthy form, have asked me whether I could 

 not publish cheaper editions of some of my oivn books. 

 In the great majority of cases, the matter does not rest 

 in my own hands ; but having had an opportunity to 

 purchase from Messrs. Smith, Elder, & Co., their 

 rights in my three works, "THE BORDERLAND OF 

 SCIENCE," " SCIENCE BYWAYS," and the " POETRY 

 OF ASTRONOMY," / have much pleasure in so far 

 acceding to the above-named wishes, as to publish an 

 edition of each of these works at two-thirds of their 

 original price. Owing to the circumstance which 

 led to this, I have thought it desirable to class those 

 three books as the first three volumes of a series to 

 be called the KNOWLEDGE LIBRARY. Most of the 

 volumes of the series are to be republications of Essays 

 by various Contributors to the Magazine from which 

 the series takes its name. 



RICH D - A. PROCTOR. 



LONDON, September, 1882. 



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