WHOLE VOL. NORTH AMERICA 955 



WASHINGTON, UNITED STATES 

 Lat. 38° 54' N. Long. 77° 3' W. H„ = 112 ft. 



ti<:mperature in degrees f. 



Means of * 



* 1820-35, Means of observations made at 7 a. m., 2 p. in., 9 p. ni. 

 1838-42, Means of observations made at 3 a. m., 9 a. ni., 3 p. m., 9 p. ni. 

 1846-48, Means of obsenations made at 9 a. ni., 3 p. m., 9 p. m. 

 1848-49, 1854-59, 1862-72, inel., furrcctt-d In a mean (if 24 lioms. Cnrreclions applied m.l kruiwn. 



