THE SCIENCE SERIES 1. The Study of Man.—By A. C. Haddon. Illustrated, 8o, $2.00. 2. The Groundwork of Science.—By St. George Mivart. 8o, $1.75. 3. Rivers of North America.—By Israel C. Russell. Illustrated, 8o, $2. 00. 4. Earth Sculpture.—By James Geikie. Illustrated, 8o, $2.00. 5. Volcanoes.—By T. G. Bonney. Illustrated, 8o, $2.00. 6. Bacteria.—By George Newman. Illustrated, 8o, $ ? G. P. PUTNAM'S SONS, New York and London

The Science Series EDITED BY
Professor J. McKeen Cattell, M.A., Ph.D.
AND
F. E. Beddard, M.A., F.R.S.

BACTERIA

BACTERIA

ESPECIALLY AS THEY ARE RELATED
TO THE ECONOMY OF NATURE
TO INDUSTRIAL PROCESSES
AND TO THE PUBLIC HEALTH
BY
GEORGE NEWMAN
M.D., F.R.S. (Edin.), D.P.H. (Camb.), etc.
DEMONSTRATOR OF BACTERIOLOGY IN KING'S COLLEGE, LONDON
ILLUSTRATED
NEW YORK
G. P. PUTNAM'S SONS
LONDON
JOHN MURRAY
1899


Copyright, 1899
BY
G. P. PUTNAM'S SONS
The Knickerbocker Press, New York


PREFACE