>o i i m i;< i DOSE kfi v DIS1 \H Ol I HE MASSES 



beats after slight e\ it ion: :i Qttie change m disposition, at times 

 an increased irritability or a feeling f de|>ivion; a disin- 

 clination to pursue crrtain work which the individual formerly 



. l> do, or even a disinclination to pleasures which were 



ly liiin. 



In the matter , .ited. it is often possible to find the 



tulM-rcle l)acillus with the aid of tin- mi and c<Ttain 



coloring matters. It appears in the form of -mall, -lender 

 rods. To give an idea of the minute size of the>- l.acilli or 

 bacteria, we reproduce here what is called a microscopic ii Id 

 twelve hundred times enlarged; in other word-. ju>t what one 

 se<> after having jnvj.ared a small portion of expecto 

 tul>ereulous matter under the micro.-copr. The rods rep; 

 the bacilli: the rounder irregular bodies represent other >ul>- 



es, mucus or pus, which have been ejected alon^r with the 

 bacilli (Fig. 2). 



CHAPTER II 



How MAY THE GERM OF CONSUMPTION (BACILLUS Ti I 

 LOSIS) ENTER THE HUMAN SYSTEM ? 



1 By being inhaled; that is, breathed into the lungs. 



_'. Hy U-incr ingested; that is, eaten with tuberculous fund. 

 or milk derived from tuberculous animals or anything 

 edible with which tuberculous matter has come in conta 



3. By inoculation; that is, the penetration of tuberculous 

 substance through a wound in the skin. 



Of these three ways in which the baciUi may enter the hu- 

 man system, the first one seems to U the most frequent. 



CHAPTER III 



How DOKS i HI: INHALATION <>i TIN; 1>\< iu,i TAKI. 1Y 



A consumptive individual, even at a period when he is not 

 confined to his bed, may expectorate enormous quantities of 

 bacilli. Now if this expectoration, or spittle. i> 

 deposited here and there, so that it has an opportunity to dry 

 and become pulveri/<-d. the l<-,-i>t draught or motion in the 

 air may cause it to mingle with the dust, and the individual 

 breathing this dust-laden atmosphere is certainly 



