Of ail Booksellers. Price One Shilliuc net. : 
NATURAL SCIENCE: 
_ A MONTHLY REVIEW OF SCIENTIFIC PROGRESS. a 
OCantaine Mateos Act at Ho = Suse _ a fe a aan aes 
’ f y trie 
LONDON AND. NEW YORK 4. 2.530 MACMILLAN AND Co. 
‘ORNITHOLOGISTS’ co 
