CONTENTS. 



TABU XVII. Mean atmospheric pntturt at tht mural obturation hour* of each month , . . . . . 373 



TABLR XVIII. Excess of the atmospheric preuure at each observation hour above the mean monthly value at that hour . . 374 



TABU: XIX. IJuartrrhi und anntuil menus "f l/ie ttlinn.y>hfri>- ]>rmsurf ......... 375 



TABLE XX. Monthly and annual meant of the atmospheric preuure at each observation how ..... 376 



TABLE XXI. Mean temperature of the air at the leveral altercation hourt of each month ...... 377 



TABLB XXII. Variation of the monthly temperature at each hour, from the mean derived from all the observations in cor- 

 responding months of the several years . .......... . 378 



TABLB XXIII. Quarterly and annual means of the temperature of the air . . . . . . . 379 



TABLE XXIV. Monthly and annual meant of the temperature of the air at the several observation hourt .... 380 



TABLB XXV. Mean monthly and annual temperatures, deduced from all the in-hourly observations .... 380 



TABLE XXVI. Mean monthly maxima and minima of the temperature ......... 380 



TABLB XXVII. Mean daily range of the temperature in each month, from the registering thermometers .... 381 



TABLE XXVIII. Showing the days, maxima, minima, and range of the temperature in each month, from the registering ther- 

 mometers . . . , . . . . . . -. . . . . 381-382 



TABLE XXIX. Mean monthly and annual temperatures, from the maxima and minima ...... 382 



TABLE XXX. Mean monthly and annual temperatures, from all the observations ....... 382 



TABLE XXXI Mean temperature of evaporation (wet-bulb thermometer) at the several observation hours of each month . . 383 

 TABLE XXXII. Excess of the mean temperature of the air at the several observation hours of each month, above the mean tem- 

 perature of evaporation at the same hours ............ 384 



TABLE XXXIII. Quarterly and annual means of the temperature of evaporation ....... 385 



TABLE XXXIV. Mean difference betiveen the temperature of the air and that of evaporation at the several observation hours of 



the four seasons of the year . . . . . . . . .,.-.. .- 386 



TABLE XXXV. Monthly means of the. force of the aqueous vapor at the several observation hours . . . . ... 387 



TABLE XXXVL Quarterly and annual means of the force of the aqueous vapor at the several observation hours . . 388 

 TABLE XXXVII. Showing the number of days in each month during which the wind blew from each direction at the several 



observation hours . . . . .... . . . . . . . . . 388-398 



TABLE XXXVIII. Showing at each observation hour in the several years the number of winds from each direction and the 



annual means of the same ............. 399-402 



TABLE XXXIX. Shou-ing at each observation hour of the several months the mean number of days on which the wind pre- 

 vailed from each direction . ... . . . . . . . . . . . 403-404 



TABLE XL. Showing the prevailing wind at each observation hour of the several months ...... 405 



TABLE XLI. Showing the number of days at every observation hour of each month, during which the wind blew with a certain 



force. . . . . . . . . ... .- . . . . 405-415 



TABLE XLII. Monthly means of the force of the wind at each observation hour ....... 416 



TABLE XLIII. Quarterly and annual means of the force of the wind ......... 417 



TABLE XLIV. Monthly mean portion of sky obscured by clouds at each observation hour ...... 418 



TABLE XLV. Portion of the sky obscured by clouds in quarterly and annual periods ... . . . . 419 



TABLE XLVI. Aggregate fall of rain in each month, with the monthly and annual means from the same . . . 420 



