INDEX. 



26l 



Moon, zenithal full, relative illumination intensity of. . 218 

 quarter, relative illumination intensity of 218 



Nautical mile, equivalent in statute xx, 48 



Newcomb, Simon, work cited xxii 



Notation, Beaufort's, weather lxxii, 236 



Ounces, conversion into kilograms xxiii, 60 



kilograms into xxiii, 61 



Palm, Netherlands, value 48 



Parallel, length of a degree on lxiv, 202 



Paschen, F., treatise cited ■ • 231 



Pounds, conversion into kilograms xxiii, 60 



imperial standard xxiii 



Pressure of saturated aqueous vapor, 

 over ice, 



English Hi— Iv. 160 



Metric lii-lv, 165 



over water, 



English lii-lv, 161-164 



Metric lii-lv, 166-168 



decrease with altitude at mountain stations 



lxi-lxii, IQ4 

 Pressure, standard units of, 



conversion of barometric readings into, 



xvii-xviii, 36-39 

 (See also Barometer) 



Prototype kilogram \ xx "j 



Psychrometric formula lvii-lxi 



Psychrometric observations, 

 reduction of 



English lix-Ix, 172-182 



Metric Ix-lxi, 186-191 



Quantity of rainfall corresponding to different depths 



lxiii, 195 



Radiation, solar, relative intensity of, 



for 24 hours at top of atmosphere lxvii, 217 



during year at surface of the earth lxviii, 218 



transmission percentages of, through moist air, 



lxxi, 231 

 Rainfall, conversion of depth of, into gallons and tons 



lxiii, 195 

 Reaumur, conversion to Approximate Absolute, Cen- 

 tigrade and Fahrenheit xii, 2-4 



Reduction, of barometer to 



standard gravity xxxiv-xxxviii, 129-133 



standard temperature... xxx-xxxiv, 86-128 



of psychrometric observations, 



English lvii-lx, 172- 



Metric lvii-lxi, 186- 



of snowfall measurements lxii, 194- 



Regnault, treatise cited. xxxii, li, lii, 



Relative humidity, 



English lx, 183- 



Metric. . .• _ lxi, 192- 



Relative intensity of solar radiation, .lxvii-lxviii, 217- 



Rode, Danish, value of 



Rotch, A. L., work cited 



Rowland, work cited 



Rubens and Aschinass, treatise cited 



Ruthe, Prussian, value of 



Norwegian, value of 



XXV 



lxxi 



-3i 



Sagene, Russian, value of 48 



Scales, comparison of Approximate Absolute, Centi- 

 grade, Fahrenheit, and Reaumur xii-xiii, 2-4 



Sea-level, 



reduction of temperature to, 



English xxx, 82 



Metric xxx, 83 



Seconds, conversion of decimals of a day into xxi, 56 



into arc xx, 51 



into decimals of a day xxi, 56 



into decimals of an hour xxi, 57 



reduction for, sidereal or solar time xxii, 58 



Sidereal time, conversion to mean solar xxii, 58 



Simpson, Dr. G. C, work cited xxv 



Sky, relative illumination intensity, 



at sunset 218 



at end of civil twilight 218 



Snowfall, weight corresponding to depth of water 



lxii, 194-195 



Solar radiation, intensity of, 



for 24 hours at top of atmosphere lxvii, 217 



during year at surface of the earth lxviii, 218 



Solar time, mean, conversion into sidereal. . . xxii xxiii, 58 

 Specific gravity, of air xlj 



of aqueous vapor lv-lvi 



Spectrum, water vapor lines in visible lxxi. 229-230 



absorption in infra-red lxxi, 230 



Spheroid, Clarke's xx 



Starlight, relative illumination intensity of . 218 



State of weather, Beaufort notation for lxxii, 236 



Stations, list of meteorological lxxii, 237-257 



Statute miles, conversion of, into nautical xx, 48 



Stefan, work cited lvii 



Sun, declination of .lxvi, 214 



relative illumination intensity of zenithal 218 



Sunrise, time of, defined lxvi 



Sunset, time of, defined lxvi 



Sunshine, duration of lxy, 203-214 



Symbols, International Meteorological lxxi, 232-233 



Temperature, 



correction for, of thermometer stem xv, 14 



reduction to sea level xxx, 82, 83 



term in determination of heights by barometer 



xlii-xliii, xlv-xlvi, 138-139, 147-148 

 term in determination of density of air 



lxix-lxx, 220, 224-225 



Thermodynamic thermometric scale, defined . . . xi 



Thermometer, hypsometric -Hi, 158 



correction for temperature of mercury in stem 



xv-xvi, 14 



Thermometric scales, defined • xii 



interconversion of .xii, 2-4 



Thiesen, M., work cited l"i, liv 



Time, 



arc into xx > 5° 



into arc xx > S 1 



mean, at apparent noon xxii, 57 



mean solar into sidereal xxii, 58 



sidereal into mean solar xxn, 58 



Toise, value of • _. . . .48 



Transmission percentages of radiation through moist 

 air l xx |. 2 3i 



Twilight, duration of astronomical lxvii, 215 



duration of civil lxvii, 216 



Vapor, aqueous, 

 pressure of, 



English lii-lv, 160-164 



Metric .lii-lv, 165-168 



pressure by psychrometric observations, 



English Hx, 172-182 



Metric lx, 186-191 



pressure decrease with altitude, 



for mountain stations lxi, 194 



specific gravity lv-lvi 



weight of lv-lvii, 169-170 



Vara, values of, 



Mexican 48 



Spanish 48 



Versta or Werst, value of • 48 



Visible spectrum, water vapor lines in lxxi, 229-230 



Waals, J. D. van der, work cited liii 



Water, vapor of (see Aqueous) 



Weather, state of, Beaufort symbols for lxxii, 236 



Weight, of saturated aqueous vapor, 



Cubic foot lv-lvii, 169 



Cubic meter . lv-lvn, 170 



in grams, of a cubic centimeter of air, 



English lxix-lxx, 220-223 



Metric lxix-lxx, 224-228 



Werst or versta, value of 48 



Wind tables • xxiv-xxix, 64-79 



Wind, mean direction by Lambert's formula 



xxv-xxvii, 71-76 

 true direction and velocity at sea, determina- 

 tion of xxv 



gradient, velocity of xxvii-xxix, 77~79 



radius of critical curvature, .xxvii-xxix, 77-79 



scale, Beaufort's xxiv-xxv, 70 



synoptic conversion of velocities xxiv, 64 



Year, days into decimals of, and angle xx, 52 _ 55 



tropical, length of xxii 



