PREFACE TO THE NEW EDITION. 
Manyfold indeed were the acknowledgments of the useful- 
ness of this little volume. It has been translated abroad in four 
different languages, and it is to-day used all over the civilized 
world and acknowledged authority on the subject upon which it 
treats. The scores of letters which I received from all parts of 
the world, applauding my method, are proof that the volume as 
it is, is a reliable guide, 
Only a few important additions, but no corrections, appeared 
to be necessary for this new edition. 
HUGO MULERTT. 
Brooklyn, N. Y., March, 1896. 
