SCIENC 



New Series 



Vol. LIV, No. 1404 



Friday, November 25, 1921 



Single Copies, 15 Cts. 

 Annual Subsckiption, $6.00 



Research Apparatus 



The Freas Sensitive Water Thermostat 

 in regular use in the leading American 

 and Canadian Universities and Colleges. 



Designed to furnish continuous constant 

 temperature from lowest temperature of 

 water or water solution available up to 

 50° C. Large size is sensitive to 2/1000° 

 C. Small size (see cut) is sensitive to 

 1/100° C. The large size has rectangu- 

 lar copper lined tank of 8 5 gallon capac- 

 ity. The small size has round inner glass 

 tank of 10 gallon capacity. Both sizes 

 use the standard Freas sensitive mer- 

 cury regulator. 



Price of the large size, $ 480.00 



Price of the small size, | 220.00 



For details of the large size thermostat, 

 also of the Freas water bath write for 

 Bulletin "Freas Water Baths and Ther- 

 mostats." 



For details in regard to other forms of 

 Freas apparatus we refer to the following 

 bulletins: 



Freas Conditioning Ovens; Freas Con- 

 ductivity Apparatus; Freas Incubators 

 and Sterilizers; Freas Ovens and Tube 

 Furnaces; Freas Vacuum Ovens. 



Freas Water ThermoEtat, Small Size 



Any of these bulletins wiU be sent without charge on request, also information in re- 

 gard to Freas Steam Hot Plate or Freas Hot Water Mixer 



E l A"0 « -1 



NEW YORK CITY 

 3rd Aye~ ISth— 19tli St, 



PITTSBURGH BRANCH 

 4048 Jenkins Arcade 





