PREFACE.
I am by the courtesy of the proprietors of The Practitioner permitted to republish in book form, with amplifications, a series of three papers on Anti-Typhoid Inoculation recently contributed to that Journal.
I endeavour to give here a brief exposition of the scientific principles involved in anti-typhoid inoculation and a summary of the practical results already achieved.
In Chapter I. I deal with the General Principles of Immunisation ; in Chapter II. with the Application of these Principles to the particular Problem of producing Immunity to Typhoid Fever ; in Chapter III. with the Technique and Clinical Effects of Anti-Typhoid Inoculation ; in Chapter IV. with the Practical Results achieved as disclosed in the Statistical Records.
In connection with these Records I have had to consider the general questions which arise in connection with the cogency of statistical evidence.
All these subject-matters not excepting that which is concerned with the appraisement of the statistics of anti-typhoid inoculation make, it is to be feared, certain demands upon the reader in the form of intellectual effort.
