XXIV EXPLANATION OF TABLES. 



Ratios. — The ratios invariably refer to the wliole number examined, as announced at 

 the head of each cohimn. 



Example. — The relation of a disease, phthisis pulmonalis, for example, to occu- 

 pation is to be observed in this manner. On page 469 it will be seen that 14 Afjents 

 were rejected on account of the disability in question. The ratio of this number of 

 rejected men to the whole number of Agents examined, namely, 450, is stated at 

 31.111 in the thousand. Similar infonnation is furnished respecting the disease by the 

 remaining six columns of the page. On turning to page 474, it will be seen that 

 phthisis pulmonalis appears in relation to seven other occupations ; and it will be 

 found, in hke manner, on pages 479, 484, 489, 494, 499, 504, 509, 514, and 519. On 

 this last page will be observed, in the column on the right, the total number of men 

 of all occupations rejected on account of phthisis, namely, 3,724. The ratio of this 

 number to the whole number of men examined, namely, 334,321, is stated in the next 

 colunm at 11.134 in the thousand. 



A class of diseases, or a subdivision of a class, is to be traced through the series 

 of eleven tables of occupations by the same method. 



If it be desired to note the relation of any one occupation to various forms of 

 disease, the following is the necessary proceeding : Let the column headed BaJicrs, 

 commencing on page 469, be selected. It will first be seen that 1,975 of these work- 

 men were examined in all. The column must then be followed down through five 

 pages, and opposite each disease and each subdivision and class of diseases will be 

 seen the number of bakers rejected, and the rate in the thousand to the whole number 

 of bakers examined. At the foot of page 473 will be seen the number of bakers 

 rejected for all diseases, namely, 807, which, to the 1,975 examined, is seen to be at the 

 rate of 408.608 in the thousand. 



TABLES No. 21 AND No. 22. 



*4t* From the large number of figures required to illustrate the relation of locality 

 to disease in the case of the drafted men, it became convenient to separate the results. 

 One of these tables, therefore, contains only numbers, and the other only ratios. 

 The two combined form one complete table. 



It will be seen that the list of diseases in this table is more circumscribed in 

 extent than in the preceding tables. This arises from the fact that the drafted men, who 

 alone appear in it, were subject to stringent regulations, under which fewer causes of 

 exemption were tolerated than in the case of recruits or substitutes. 



Material. — Only drafted men are represented in these tables, the entire number 

 being .501,002. Of these, 141,697 were rejected, being at the rate of 282.827 in the 

 thousand. The rate of aptitude for the table is therefore 717.173. 



Purpose. — The purpose proposed is to show : 



1. The proportion of these drafted men furnished by each congressional district 

 and by each State. 



2. The proportion of these drafted men rejected for each disease for each subdi- 

 vision and class of diseases, and for all diseases, in each congressional district and iu 

 each State. 



1 



