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. 



