The consideration of Epidemic disease here set out,
while illustrated by the study of a Diphtheria Epidemic,
represents rather the conclusions arrived at after some
twenty years experience of disease in general gained in the
practice of Medicine and Surgery, amplified by two years
recently devoted to the study of Preventive Medicine and
Bacteriology in particular. Little of originality is claimed ;
but the exceptional advantage of being able to discuss an
epidemic from personal investigation thereof, from the clinical and epidemiological at the same time as from the Bacteriological standpoint is undoubted.
Personal experience would stand for little, unless it had
been aided by the study of the recent and current literature
on the subject of Diphtheria and Epidemics in general. Contributions to the various Medical Journals, `Public Health,'
Journal of Hygiene, and different publications and text books
have all been taken advantage of ; and amongst others contributing to these may be mentioned the names of Loeffler,
Newsholme, Newman, Theobald Smith, Cobbett, Graham
Smith, Delépine, Woodhead. I may add that I owe much to
Professor Delépine of Manchester, under whom I spent
various periods of study from 1908 to 1910 ; for no one can
come in contact with him without being infected with his
enthusiasm in the cause of Preventive Medicine and trying
to emulate in some degree his extraordinary precision and
thoroughness and attempting to adopt his breadth of outlook.
The personal friendship as well as continuous help and
suggestion of Dr. Buckley, Medical Officer of Health for
Crewe, greatly assisted my work at Crewe.