266 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Fia. 1. The Ekman Propeller Current Meter (‘‘ Propell-Strommesser ’’) 
in use on §.Y ‘‘ Ladybird ” :— 
A. Side view showing vane, dials, compass-box, releasing catch, &c. 
B. End view showing propeller, &c. Both messengers are in position. 
C. Compass-box for receiving the brass pellets. 
