PREFACE. vii 



original drawings. Intelligence, learning, and never-failing conscientiousness have been given 

 almost every line of the work by Drs. Dorland and Eshner. The same is true of the work of 

 Dr. David Riesman. 



It seems almost wrong to mention in a second order the names of Professor S. H. Gage, 

 Professor Henry Leffmann, Dr. A. C. Wood, Dr. Alfred Stengel, Professor A. P. Brubaker, Dr. 

 J. Chalmers Da Costa, Dr. A. H. Cleveland, Mr. Ryland W. Greene, Dr. J. Hendrie Lloyd, 

 Mr. Pierre A. Fish, Dr. D. Bevan, Dr. Emma Billstein, Dr. S. McClintock Hamill, Dr. A. H. 

 Stewart, and others. 



Every author well knows, or perhaps regrets that he does not know, the blessing of a 

 publisher and of a printer who take pride in their work above and beyond the question of 

 dollars and cents. Such a publisher and such a printer I have had. 



The acceptability of the smaller dictionaries I have offered the profession (something like 

 twenty-five thousand copies having been distributed) leads me to hope that the present more 

 complete work will find a wider range of usefulness. 



Philadelphia, April, 1894. 



PREFACE TO THE THIRD EDITION. 



The rapid exhaustion of the first and second editions of this dictionary permits me to 

 correct a number of typographic and other errors, to modify some definitions, and to add new 

 material throughout the entire extent of the book. I have profited by the kind criticisms of 

 friends and of reviewers, and such suggestions as seemed to me just have been accepted and em- 

 bodied in the work. In science, and especially in the science of medicine, what was true yester- 

 day may be only half-true to-day, and may even be wholly untrue to-morrow. Old knowledge 

 is constantly undergoing modification, and new knowledge is as constantly appearing, so that it 

 is only by constant changes that a book seeking to reflect the condition and growth of a science 

 can from day to day remain a perfect mirror of its progress. 



The most outspoken words of praise in reviews, notices, private letters, etc., as also the 

 exhaustion in so short a time of two large editions, give evidence that the volume has found a 

 certain field of usefulness, and, personally, nothing can be more gratifying than the assurance 

 that one has been of distinct service to his profession and to his fellows. 



Philadelphia, September, i8gj. 



PREFACE TO THE FIFTH EDITION. 



In the present fifth edition I have endeavored to reduce the remaining inaccuracies to a 

 minimum. I have also added the more important of the new terms in medicine which have 

 come into use since the issue of the fourth edition. The changes in the text number alto- 

 gether about four hundred. 



GEORGE M. GOULD. 



Philadelphia, March, igoo. 



