AND CONTENTS OF THE MOUTH. 323 



d. — A dropped spindle-like bacillus, more enlarged, in quick motion 

 (Bacillus tremidus of J\iii>ijiu), x 1250. 



Fig. 15. 



Articulations and comma bacilli, with vacuoles, in apparent conjugation, 

 with unacidulated solution of iodine, from patina dentaria, x 2500. 



Fig. 16. 



Specimen of fructification by ears, filling up two visual fields 

 (coloured for two hours with gentian violet) from a very slender layer 

 of pulmonitic sputum, on the seventh day after the emission, x 850 

 and X 2500. 



^.— A principal tuft. B. — A part of it drawn down to the 

 bottom from the pressure of the cover-glass, x 850. (This specimen 

 is erroneously marked Fig. 14 in the Plate.) 



a. — Denudated Stalk, containing gemmules of reserve, x 850. — 

 a'y A part of it more enlarged, after a long saturation with glycerine, 

 with a trace of knot, x 2500. 



b. — A long ear, mostly scattered, x 850. 



c. — A broken ear, with clear section, x 850. 



d, e. — Cumuli of sporules dropped from the adjacent ears, x 850. 



/, g. — Points of two ears bent down from the pressure of the cover- 

 glass, X 850. 



N.B. — Other fragments of ears were seen scattered about the 

 visual fields, around the specimen here delineated. 



Saturn's Rings. —It has long been the accepted theory that 

 Saturn's rings consist of swarms of minute satellites crowded 

 together, but hitherto the evidence in support of this view has 

 been chiefly of a negative character, it having been proved by 

 mathematicians that the rings could not maintain their shape if 

 they were solid or fluid masses. A recent telegram from Pitts- 

 burgh announces that Prof. Keeler, of the Alleghany Observatory, 

 has proved from spectroscopic observations that the rings are 

 actually formed of satellites which do not all revolve at the same 

 rate, thus affording an interesting confirmation of the present 

 theory. 



