ALPHABETICAL INDEX. 723 



- PAGE 



Correction of Time from Solar observation to obtain True time of Clocks . 697 

 Corrections, .Horary, Periodic Var. Temperature .... 579-650 



Horary, to be applied to obtain True mean Barometric Pressure, 

 Greenwich ........ 432 



" Horary, to be applied to obtain True mean Barometric Pressure, 



Philadelphia ........ 431 



" for Half-sums of Temperatures at Geneva and St. Bernard, Planta- 



mour ......... 420 



u Monthly, for Non-periodic Var. Temperature . . 654-679 



Cubic foot of air, Weight of Vapor in English measures .... 130 



. " " " " Greenwich Obs. . . . .179 



" " dry and saturated air compared in weight .... 180 



" metre of air, Weight of Vaor in French measures . . .74 



" u " " Grammes, Kaemtz . . .192 



u " " " u Pouillet 192 



. D. 



Day, length of 711 



Degrees from Time ......... 695 



" into Time ......... 693 



" length of on Meridian and Parallel . . - . . . 698 



" Squares of . . . . '. . . . .703 



Delcros, correction for capillary action, metrical . . . . . 338 



" depression from capillary action ...... 340 



" Hypsometric Tables . . . . . ... 349 



" normal height of meniscus ...... 337 



" Keduction of Metrical Barometer to freezing point . . . 281 



Dew point, factors for deducing weight of Vapor ..... 179 

 " from Psychrometer readings ..... 178, 182 

 " Guyot's Tables (English measures) ..... Ill 

 " Haeghen's Tables for reducing Kelative Humidity (French measures) 66 



Dippe's modified Gauss's Tables ....... 793 



" Tables ' . . . .398 



Drontheim, Hourly corrections Periodic Var. Temperature . . . 642 



Dublin, Hourly corrections Periodic Var. Temperature .... 635 



E. 



Elastic force of Aqueous Vapor (English measures) . .78 



" (French measures) . . . .46 



" " (Greenwich constants) . . . .137 



Vapor, difference in Values ..... 190 



u " English Inches, Koyal Soc. Eeport . . . 189 



" in millimetres, by August .... 186 



" " u Kaemtz . . . .188 



u " " Magnus . . . 188 



England, standards of length compared with those of other nations . . 709 



English Barometer and Metrical Barometers compared .... 215 



