METERS 

 200 



ATMOSPHERES (GAUGE) 



Figure 9. Energy equivalent of physical work required to keep a siphono- 

 phore float of 1 mm 3 volume inflated while migrating from 100 meters to 

 various lower depths. 



in which n is the molar quantity of the gas in question and 

 T, the temperature absolute. W here will be read directly 

 in gram-calories. The work required to compress 30 mm 3 

 of CO from 10 to 40 atmospheres at 8°C for a siphonophore 

 possessing a 1 mm 3 float equals 0. 003 gm-cal. 



Average oxygen consumption from table 1 is 0. 069 

 mm 3 /mg/hr. For a nanomian colony weighing 15 mg this 

 equals 1. 04 mm 3 of oxygen utilized per hour, equivalent to 

 about 0. 005 gm-cal, * slightly less than twice that required 



Caloric equivalent of 1 cc of oxygen is taken as 4.8 gm-cal. 



26 



