INDEX. 



621 



Widal reaction, agglutinating power, re- 

 lation of, to immunity, 492 



transmission of, from parent 



to child, 490 

 substance, chemic nature of, 491 



distribution of, 489 



relation of, to leukocytes, 492 

 clinical value of serum diagnosis, 



502 

 condition of culture, 499-501 

 culture method, 496 

 duration of, 487 

 table of, 488 

 rapid method, 496 

 relation of, to germicidal activity 



of blood, 489 

 slow method, 496 

 specific nature of, 494 

 technic of, 495 

 time of development, 484 

 Wolfhiigel's apparatus for counting 



colonies of bacteria upon 



plates, 233 

 Wooden tongue, 357, 362 

 Wool-sorters' disease, 461. See also 



Anthrax. 



Wounds as channels of entrance for 



tubercle bacilli. 312 

 Wynekoop's culture-outfit for isolating 



bacillus influenzae, 570 



X bacillus, 518 

 A'-rays, influence of, on 

 bacteria, 49 



growth of 



Yellow fever, 518 



antitoxin serum for, 525 

 bacillus coli communis in, 518 

 bacillus of, 518. See also Bacillus 



icteroides. 

 bacillus of Havelburg in, 524 

 bacillus X in, 518 

 cause of black vomit in, 522 



of death in, 522 

 pathology of, 523 



Yersin's serum for plague, 562 



ZlKHL's method for demonstration of 

 tubercle bacilli in sputum, 

 298 



Zooglea, 2 1 1 



Zymogenic bacteria, 51 



