578 



METEOROLOGICAL OBSERVATIONS. 



OBSERVATORY. 

 SAUSALITO, CALIFORNIA. 



INSTRUMENTS USED ON SHORE. 



Standard barometer. 



Attached thermometer. 



Thermometer, with bulb covered with lamp-black. 



" " black wool. 



" " " white wool. 



" uncovered. 

 Hygrometer. 

 Temperature of water, and thermometer at mast-head, observed on board the U. S. Ship Vincennes. 



