"To the student of biology and the student of that part of applied biology included in medicine, the laboratory method of learning the functions of the tissues and organs of the animal body has demonstrated its superiority over other methods, not only in impressing vividly the facts of observation, but also in demanding a discipline which furnishes to the student power to go forth with assurance in independent search. That the purposes of laboratory instruction may be served, the attempt has been made to arrange the experiments in this book, both in the larger and smaller divisions of the subject, so as to render answers in an orderly manner to the following questions: -- First. -- Of what activity is an organ or tissue capable? Second. -- How do certain factors condition or modify that activity? An attempt has been made also to arrange the experiments so that facts with widest bearing are observed first"--Preface. (PsycINFO Database Record (c) 2010 APA, all rights reserved).