4 I'KII \ I TO nil! SKVKN I'll \\ir.Kh \\ KDITION 



of necessity, much larger and more 



profusely illu-trated. While tin- P.nl edition had Mi pa^es, 



-.ml _':> illustrations, tin- P.)l 1 edition has 124 pages," 



:U chapter-, and <i4 illustrations. For brevity's sake I have 



omitted the pn -faces of the _M. M, Ith, ."th. and lith edi- 



I liad i in them to the gradual progress of anti- 



tulMTculosis work which, ho- 'iced not no 1 lated, 



the changes in the text sjxak for the progress. For the 

 U-nelit of my new readers I must again explain what I had 

 mentioned in one of the prefaces of a former edition, namely, 

 It is that this essay has not been published by one of the 

 well-known firms handling medical and popular scientific books. 

 The reason is the following: I have insisted from the first to 

 the present edition that the book should be put on the market 

 at retail for I*."* Oentfl for the paper-bound, at ~>0 cents for the 

 cloth-bound copies, and at wholesale correspondingly cheaper. 

 This low price did not insure sufficient remuneration to the 

 various publishing houses to which I applied. There are 

 enough good books on tuberculosis in the market cost in : one. 



three, and five dollars, intended for the layman of in 

 but for the masses who need the information most there are 

 very few to be had at a price within their reach. I had the 

 choice of having the book put on the market at a price far too 

 lii^h for the purpose it was intended for, or of abandoning its 

 publication. In my dilemma I appealed to a former secretary 

 of mine, who undertook the publication of the first editions. 

 and now I have been fortunate enough to interest Professor 

 Edward T. Devine. the editor, and Mr. Arthur P. Kello^r, 

 the business manager of the Surrey, the official Organ of the 

 New York Charity Organization Society, in the publication of 

 -say. As a result of this kind co-operation I am able to 

 continue to have the lx>ok published and sold at this low price, 

 notwithstanding the increased size of the volume. Through 

 the medium of the Publication Department of th 



ii ids of copies of previous editions have already been 

 distributed throughout the United States. 



To the many friends of the anti-tuberculosis cause in this 

 country and abroad who are known to me, and to the equally 

 large number whom I have not yet the privilege of knowing. I 

 want also to express my thanks for the encouragement and 



ation which they have given me in my work, and for 

 the numerous kind messages transmitted to me or expressed 

 in various medical or lay journals, pamphlets, and circulars. 



