266 MICROBES, FERMENTS, AND MOULDS. 
meat. The flasks are all modifications of the form 
indicated in Fig. 76. These flasks are heated in an 
iron gas stove (Fig. 104), of which the double case is 
heated by gasburners, and it contains a basket of iron 
wire as the receptacle of the flasks, tubes, etc, which 
ITUNES CLAAPOROO OY ECEOLS REALL OE DED ACOA HOO ITC ET TET 
H t eT BN iif) f 
Fig. 106.—Stand, bearing culture tubes. 
are to be sterilized. The temperature, regulated by a 
thermometer, must rise to from 150° to 250°. 
The nutritive liquid is boiled in a porcelain cru- 
cible in the open air, and is introduced by breaking 
off the tapered end of the flask; it is then instantly 
plunged into the broth, and drawn by an aspiration 
through the opposite tube, after which the tapered 
end is resealed at the lamp. 
