SCIENCE 



j! m 



New Series 



Vol- XLIII. No. 1099 



Friday, Januaky 21, 1916 



Single Copies, IB Cts. 

 AuiruAL SDBSoaipTioN, 15.00 



Thelco Botanical Incubator 



Botanical investigators have long felt the need of an ap- 

 paratus that will allow plants to be grown in daylight at a 

 constant temperature. The Thelco Botanical Incubator is 

 designed expressly to meet these requirements; it can be 

 used, however, for other constant low temperature purposes 

 when light is not objectionable. 



The Incubator is provided with double 

 walls of heavy glass, with an air space 

 between. The frame and door frame are 

 made of an ingenious casting of aluminum, 

 so arranged that the inner and outer 

 glass^ sides [can easily be placed in posi- 

 tion, or taken out. 



The Incubator is fitted] with the 

 Thelco Bimetallic Thermostat, the contact 

 points of which are moved by the screw 

 which projects through the top of the In- 

 cubator. The Thelco Thermostat is ex- 

 tremely sensitive, and will maintain a 

 temperature constant to within a fraction 

 of a degree. 



Size of chamber ISJ/^ inches wide, 19 

 inches deep, 24 inches high; outside di- 

 mensions 21 inches wide, 21 inches deep, 

 32 inches total height. 



Thelco Botanical Incobator, with glass sides, Thelco Thermostat and metal 



shelves, mounted on short legs, as illustrated net $97.50 



Descriptive pamphlet sent upon request 



ElMER tm AMEND 



Founded 1851 



INDUSTRIAL AND EDUCATIONAL LABORATORY APPARATUS 

 CHEMICALS AND DRUGS 



NEW YORK 



N. Y. 



PITTSBURGH 



PA 



