THE 



KNOWLEDGE ' LIBEAEY. 



EDITED BY 



RICHARD A. PROCTOR. 



SCIENCE BYWAYS. A Series of Familiar Disserta- 

 tions on Life in Other Worlds. By EICHAED A. PHOCTOB. Crown 

 8vo. 6s. 



The POETRY of ASTRONOMY. A Series of Familiar 

 Essays on the Heavenly Bodies. By EICHAED A. PBOCTOR. 

 Crown 8vo. 6s. 



NATURE STUDIES. Reprinted from 'Knowledge.' 

 By GBANT ALLEN, ANDREW WILSON, THOMAS FOSTEB, EDWARD 

 CLODD, and KICHARD A. PROCTOR. Crown 8vo. 6s. 



LEISURE READINGS. Reprinted from 'Knowledge.' 

 By EDWARD CIODD, ANDREW WILSON, THOMAS FOSTER, A. C. 

 EUNYARD, and EICHARD A. PROCTOR. Crown 8vo. 6s. 



The STARS in their SEASONS. An Easy Guide to a 

 Knowledge of the Star Groups, in Twelve Large Maps. By 

 EICHARD A. PROCTOR. Imperial 8vo. os. 



London: LONGMANS, GREEN, & CO. 



