386 



BOTANICAL GAZETTE 



[may 



TABLE I E* 



Period (43 . 25 min.) in sea w.ater followed by equal period in sea water 

 .approximately saturated with ethyl bromide 



* In the control, with 2 periods (49. 25 min. each) in sea water, the change in PH in each period was 

 7.90 — 7.30 = 0.60. 



TABLE I F 



Three periods (22 min. each) in sea water and 7 equal periods in sea 

 water approximately saturated with ethyl bromide 



■ Approximate (at this point the indicator is not very sensitive to slight changes in acidity). 



TABLE I F CONTROL 



Seven periods (27.5 min.) in sea water 



Period 



I 

 2 



3 



4 



5 

 6 



7 



I per cent ether (fig. la [C]; table I C), o. i per cent caffeine (fig. 

 la [D]; table I D), and for sea water approximately saturated with 

 ethyl bromide (fig. la [E]; table I E; fig. ib [A and B]; table I F) 

 shows that these anesthetics increase both the relative amount and 

 relative rate of respiration. 



