ZOOLOGY AND BOTANY,, MICROSCOPY., ETC. 
597 
diameter for a thermometer, which is protected by a perforated copper 
tube extending to and soldered to the bottom of the tank. 
Near the end of the cross-piece or close to the side of the tank there 
is a second and similar opening and shield for a thermostat. There is 
a faucet for drawing off the water. The tank stands upon an iron 
quadruped. Each compartment is heated by a separate burner connected 
by a T or Y tube to the gas tube leading from the regulator, J 
The smaller bath (fig. 112) is cylindrical in form, 25 cm. high and 
of about the same diameter. On one side there is a semicircular pro- 
jection forming a chamber for the thermostat. This is separated from 
\ Fig. 112. 
the main tank by means of several narrow strips of copper soldered at 
each side. The tank has a perforated false bottom. The cover has an 
opening for a thermometer. 
The Friedberg burner was found to work very satisfactorily with 
both baths. The Roux thermostat seemed to be the best regulator ; it is 
constructed of metal, is readily adjusted, and quite as sensitive as spirit 
or mercury thermo-regulators. 
The larger bath can be used for macerating meat at a high tempera- 
ture (60°— 65°), for making culture media, for sterilising, for determining 
the thermal death-points for different bacteria, and for other purposes. 
j3. Technique.* 
(1) Collecting* Objects, including- Culture Processes. 
New Medium for Bacteriological Diagnosis.f — Sigg. Pacinotti and 
Municchi have devised a coloured nutritive medium which may aid in 
* This subdivision contains (1) Collecting Objects, including Culture Pro- 
cesses ; (2) Preparing Objects ; (3) Cutting, including Imbedding and Microtomes ; 
(4) Staining and Injecting ; Mounting, including slides, preservative fluids, &c. ; 
(6) Miscellaneous. f Zeitsckr. f. angew. Mikr., iv. (1898) pp. 106-7. 
2 s 2 
