ZOOLOGY AND BOTANY r , MICROSCOPY, ETC. 



641 



the pan by means of supports (not shown in the illustrations). The 

 bottom of the pan is quite flat, and the front and left sides are higher 

 than the other two. The front and back sides, which are prolonged 

 downwards to form a support for the box, are sloped off on the left side. 

 There are two handles and an outflow pipe near the; bottom. To the 



Fig. 173. 



back of the pr.n is fixed a bar which carries a T-shaped tube, through 

 the leg of which the water enters, passing out through holes in the arms. 

 "When the apparatus is used, it is tilted by pressing on the left handle, 

 the tube is inserted in a groove and rolled round in the direction indi- 

 cated by the arrows, and then the apparatus restored to the horizontal 

 position. 



Incubator for Student Use.* — Prof. V. A. Moore describes an in- 

 cubator which he has devised for the use of a large class. It consists of 

 a chest of drawers after the Lillie paraffin oven pattern, which are placed 

 within the jacket of the incubator. Each drawer is of sufficient size for 

 the working cultures of one student. The apparatus is heated by gas- 



* Trans. Araer. Micr. Soc, xxi. (1900) pp. 103-0 (i figs.). 



