PHYSIOLOGICAL OBSERVATION'S BY RUDOLF HEIDENHAIN, M.D. PROFESSOR OF PHYSIOLOGY IN THE UNIVERSITY OF BRESLAU TRANSLATED FROM THE FOURTH GERMAN EDITION BY L. C. WOOLDRIDGE, B.Sc. Lond. WITH A PREFACE BY G. J. ROMANES, M.A., F.R.S. LONDON C. KEGAN PAUL & CO., I, PATERNOSTER SQUARE PREFACE. HAVING been requested by the publishers to write a short preface to the following translation for the purpose of introducing an interesting work to the notice of English readers, I think it desirable to say that, not having had an opportunity of reading the translation, I am acquainted with the work only in its original language. But although I am thus unable to form an independent opinion on the merits of the translation as such, I have no doubt that it has been well done; for the translator informs me that his task was undertaken at the suggestion of Professor Ludwig, and it scarcely requires to be said that a suggestion of the kind from this source is a sufficient guarantee of the competency of the man to execute the work suggested. Regarding the research itself, I feel it needless |