WATER 



M 



Plan of the Top of a Cool Biological Incubator. 



303-306 



Hearson's Cool Biological Incubator, consisting of water-jacketed chamber, surmounted 



by a vessel containing ice, the whole apparatus being surrounded by non-conducting 

 material and wood. At the side is a lantern containing an open boiler, heated by a small 

 gas or petroleum lamp-flame. 



303 s Six.eC o.. 

 304 s Ci.. 

 305 s C2.. 

 306 s Cs.. 



307 s Special Stands for the above 



308 s 



309 s 



310> 



Inside Measurements. 



9 by 9 by 12 in. 

 12 12 ,, 14 in. 

 15 15 ,, 18 in. 

 20 20 24 in. 



ICHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS 



