Biological Survey — Erie-Xiagaka Watershed 



45 



Discussion of Results 



1. — Hydrography 

 By Richard Parmenter 



Equipment. — All hydrograpliic apparatus was worked on a 

 1/4 inch galvanized iron wire attached to the barrel of a hand winch 

 and passing over the standard form of meter wheel. The meter 

 wheel was suspended from a small davit on the port quarter of 

 the vessel. The thermometers, water-bottles, etc., could thus be 

 easily controlled and lowered to the depth desired with a high 

 deojree of accuracy. 



Greene r>iuel(>\s \\;iler holile with Riclil) 



' versing thermometer 



Throughout this rei)ort all temperatures are given in the Centi- 

 :rade scale and all depths are in meters. 



