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74 THE MICRO-ORGANISMS OF THE HUMAN MOUTH.
Not all the cells of this bacterium show the iodine reaction, a
statement which applies equally well to most bacteria that turn
blue on the addition of iodine. The majority of them, how-
ever, respond very distinctly to the test, becoming stained brown
violet, either throughout (Fig. 21, o) or only in isolated places
(Fig. 21, b). I have not observed this bacillus in the dentinal
tubules ; indeed, its size would seem to oppose a barrier to its
entrance into the tubules. The size, the distinct and regular
articulation, the absence of the zigzag windings, as well as the
iodine reaction before mentioned, hinder me from admitting
this micro-organism into tlie cyclus of the above-described Lep-
tothrix innominata.
LepfotJn'/'.r hiii-cfilis maxima.
There is also found in the mucous deposits upon the teeth quite
a large number of long, thick, straight, or curved filaments,
which show a marked resemblance of form to Bacillus buccalis
maximus, except as regards the joints, which are, perhaps, some-
what shorter in the latter. These cells do not give the iodine
reaction. AVhether they are, therefore, to be regarded as a diiier-
ent variety, or as cells of the same variety, in which the substance
which assumes the blue color is not yet formed (possibly younger
cells), must for the present remain undecided. I have called
this organism Leptothrix buccalis maxima.
Jodocorctis raguiafi/s.
K
Fio. 22.
5 This micro-oro;anism occurs in consid-
O A £f "-^
« S ^ ® erable numbers in all unclean mouths.
g Sj, * ft
^ ? % ^ S Only in the case of two children, aged five
* ® '^"^^ eight years respectively, have I failed
/ ^ y
f \ to find it. It appears singly or in chains
of from 4 to 10 cells, longer being rarely
T .
1100:1. seen. The chains are furnished with a
sheath in which the cells appear -as flat
disks, or as more rounded, even square shapes, which some-
times show a great likeness to tetrads (Fig. 22). The chains
have a diameter of 0.75//. Occasionallv chains are found in
74 THE MICRO-ORGANISMS OF THE HUMAN MOUTH.
Not all the cells of this bacterium show the iodine reaction, a
statement which applies equally well to most bacteria that turn
blue on the addition of iodine. The majority of them, how-
ever, respond very distinctly to the test, becoming stained brown
violet, either throughout (Fig. 21, o) or only in isolated places
(Fig. 21, b). I have not observed this bacillus in the dentinal
tubules ; indeed, its size would seem to oppose a barrier to its
entrance into the tubules. The size, the distinct and regular
articulation, the absence of the zigzag windings, as well as the
iodine reaction before mentioned, hinder me from admitting
this micro-organism into tlie cyclus of the above-described Lep-
tothrix innominata.
LepfotJn'/'.r hiii-cfilis maxima.
There is also found in the mucous deposits upon the teeth quite
a large number of long, thick, straight, or curved filaments,
which show a marked resemblance of form to Bacillus buccalis
maximus, except as regards the joints, which are, perhaps, some-
what shorter in the latter. These cells do not give the iodine
reaction. AVhether they are, therefore, to be regarded as a diiier-
ent variety, or as cells of the same variety, in which the substance
which assumes the blue color is not yet formed (possibly younger
cells), must for the present remain undecided. I have called
this organism Leptothrix buccalis maxima.
Jodocorctis raguiafi/s.
K
Fio. 22.
5 This micro-oro;anism occurs in consid-
O A £f "-^
« S ^ ® erable numbers in all unclean mouths.
g Sj, * ft
^ ? % ^ S Only in the case of two children, aged five
* ® '^"^^ eight years respectively, have I failed
/ ^ y
f \ to find it. It appears singly or in chains
of from 4 to 10 cells, longer being rarely
T .
1100:1. seen. The chains are furnished with a
sheath in which the cells appear -as flat
disks, or as more rounded, even square shapes, which some-
times show a great likeness to tetrads (Fig. 22). The chains
have a diameter of 0.75//. Occasionallv chains are found in
