HEARSON 



LOW TEMPERATURE INCUBATORS 



No. 20848— Model C 



No. 20854— Model G 



LOW TEMPERATURE INCUBATOR, HEARSON MODEL C, for operation with a constant flow of water. Most 

 of the low temperature incubators can only be worked successfully as long as the external air is 10° b".low the tempera- 

 ture required in the incubating chamber, and the expedient sometimes resorted to of running cold water through them 

 to keep the temperature down can, in summer time, be adopted with advantage, but the results are not altogether 

 satisfactory, cultures being frequently spoiled by an unexpectedly vyarm day or night. 



ice, 



other predete — ^ , = . , , , a . j ■ »i. • * • 



even though the external air may be 30 or 40 degrees above the temperature desired in the interior. 



With capsule adjusted to 20° C unless otherwise ordered, with thermometer, ice funnel, gas fittings and 4 ft. of 

 flexible metalic tubing (or, if for oil lamp, 2 chimneys and one yd. wick) and packing. With suitable burner for either 



oil or gas heating. Please specify when ordering. , .j ,, , n .„ c,»» ci.-i, 



^ Inside Measurements Duly Free Slock 



2')844. Low Temperature Incubator Model C 9 x 9 x 12 inches S78.30 S94.00 



~n8i8 " " " " " 12 X 12 X 14 111.80 134.15 



inlT^- .. " " " " 15x15x18 " 140.75 158.90 



^llll] .. .. «' " " ;■. 20x20x24 " 198.75 238.45 



LOW TEMPERATURE ELECTRIC INCUBATOR, HEARSON MODEL G, for ice and electricity, working 

 independently of any constunt water supply as required in model C. This apparatus is identical with Model C except 

 that an electric heater is provided which automatically operates when the room temperature is lower than the tempera- 

 ture required in the chamber and an electric motor which automatically circulates the water from melting ice to the 

 water jacket when the temperature of the room is higher than the temperature required in the chamber. No connection 

 with a water supply is required and the apparatus may be set to operate at any temperature from 10° to 37 C. and can 

 be operated in any climate and in any place where water and electricity are available. Control is by the Hearson 

 capsule and full operating directions are supplied with each utensil. Voltage must be specified in ordering. 



Inside Measuremenls Duly Free Stock 



20850. Low Temperature Electric Incubator Model G 9 x 9 x 12 inches $113.40 $136.10 



TnsAi' " " " " " " 12 X 12 X 14 " 143.10 171.75 



inlll' .. " " " " " 15x15x18 " 199.80 229.00 



2Qg72. " " " " " " 20x20x24 " 252.00 302.40 



These Low Temperature Incubators have been supplied by us to leading Universities, City and State 



Boards of Health, U. S. Government laboratories, etc., all of whom are 



unanimous in reporting satisfactory service 



ARTHUR H. THOMAS COMPANY 



IMPORTERS— DEALERS— EXPORTERS 



LABORATORY APPARATUS AND REAGENTS 

 WEST WASHINGTON SQUARE PHILADELPHIA, U. S. A. 



