Hygrochase 



A seed pod that opens in humid air and closes in dry 

 air. cf. Xerochase. 



Hygrocole 



An animal living in a moist place, cf. Hydrocole, Hygro- 

 philous, Xerocolous. 



Hygrogram 



A record made by a Hygrograph. 



Hygrograph 



A self-recording Hygrometer. 



Hygrometer 



An instrument for measuring the Relative humidity of 

 the air. 



Hygropetric 



Refers to an organism that inhabits steep and wet rock 

 surfaces. 



Hygrophilous 



A plant which grows in moist or wet places, cf. Hygro- 

 cole > Xerophilous, Mesophyte. 



Hygroscopic Coefficient 



The moisture in percentage of oven-dry (100-110 C.) 

 weight that a soil will absorb in a nearly saturated atmos- 

 phere (relative humidity of 98 per cent at 25C.). 



Hygroscopic Water 



Water held so firmly by the attraction of soil particles 

 that it can be removed only by heating above 100C. It is 

 not available to plants. 



Hygrothermograph 



An instrument that makes a simultaneous record of 

 both relative humidity and temperature, cf. Hygrograph, 

 Thermograph. 



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