76 BACTERIA IN THE SPUTA 



range themselves in a longitudinal line, taking the elliptical form, 

 as in bacillus a. On the contrary, if the two buds are on the same 

 level, we shall have the case of bacillus d — viz., the two cocci, 

 resulting from the increase of the buds, will meet in the centre of 

 the stem, and, there joining together, will produce, in a cross line, 

 the dumb-bell bacterium. 



Therefore, wherever we turn our eyes, the notion of the poly- 

 morphism of the microbes, and their probable derivation from a 

 single species, is gaining firmer ground. 



<?, e' . — The bacillus drawn in e (Fig. 5, magnified to 1,750 diam.) 

 was found in the sputa of a young woman in labour, w^ho was 

 affected with bronchitis. It was mixed with other similar granular 

 bacilli, clear and of the same length, but more slender, as we see 

 in/. These baciUi, however, are common also in other sputa and 

 in the contents of the mouth ; they present a pale, granulated 

 mass, similar to that of baciUi, n (Fig. 2) and c (Fig. 5). They 

 also show, in various places, buds or internal granules, smaller and 

 paler than those found in the fertile filaments of Lepiothrix. 



In e the ends are pointed, but in / they are round. The larger 

 of the two is faintly coloured, but exhibits near one of the heads a 

 clear interstice, as is seen in a and d. The other specimen, 

 smaller and paler, exhibits a younger form of the same type. 

 These two last bacilli were found in pulmonitic sputa, and were 

 also found in the contents of the mouth. 



In the uncoloured preparations of the patina dentaria there are 

 nail-shaped bacilli, like the type e^ soft, flexible, slightly veined, 

 and having quick motion (Fig. 14, d). These bacilli are originally 

 lodged on some pointed productions, as was observed by me for 

 the first time ; their slender points form the baciUi/ h^ and h' . 



/, g, h, h'. — The very slender bacilli, / and g (magnified to 

 2.500 diameters) are also taken from a case of pneumonia. In 

 / we see a mono-articulated and strongly coloured bacillus, as well 

 as another pale and granulated. In g, a very slender one, the 

 ends of which appear to have been recently detached from a 

 longer filament. 



By comparing these specimens with the Lepiothrix, no import- 

 ant difference is noticed. 



In h another specimen of curved bacillus, resembling a point 



