WHOOPING-COUGH. 479 ing it to be the same as. that described by Afanassiew, ( and by comparison found the latter to be a much larger, shorter, more elongate bacillus. Czaplewski and Hen- sePs studies embraced 44 cases of whooping-cough, in which the bacillus was isolated 18 times; 5 cases of bronchitis, which subsequently developed whooping- cough, in all of which it was found; and i case of rhinitis and bronchitis which developed whooping-cough, and in which it was found on three different occasions. From the preceding, it will be seen that many scholars have labored to detect the specific organism of this dis- ease. At present several agree upon the presence of«a certain bacillus in the expectorated matter; but none of them have yet succeeded in producing the disease or any modification of it in the lower animals. The specificity is, therefore, a matter of much doubt, and rests solely upon the constancy of the presence of the micro-organ- ism in the sputum.