INDEX. 



Abbot, C. G.. work cited Ixxxiii, Ixxxiv, Ixxxv 



Absolute thermometric scale defined xv 



Absorption, by atmospheric water-vapor bands 



in infra-red Ixxxii, 238 



Air, coefficient of expansion xliv, xlvi 



density of, at different humidities, 



English Ixxx-lxxxi, 229-231 



Metric Ixxx-lxxxi, 233-236 



density of, at different pressures, 



English Ixxx-lxxxi, 228-231 



Metric Ixxx-lxxxi, 233-236 



density of, at different temperatures, 



English Ixxx, 228 



Metric Ixxx-lxxxi, 232 



mass of, corresponding to different zenith 



distances of the sun Ixxix, 226 



weight in grams per cubic centimeter 



xlvi. Ixxx-lxxxi, 228-236 



Angle, conversion of days intn xxiv, 52-55 



Angot, Alfred, treatise citcil Ixxix 



Approximate absolute thermometric scale de- 

 fined xv-xvi 



Approximate absolute temperature, conversion 

 into Centigrade, Fahrenheit, and Reaumur 



xvi, 2-4 

 Aqueous vapor, decrease of pressure with alti- 

 tude at mountain stations Ixxii, 202 



precipitable water equivalent 



Ixvi-Ixviii, 176-178 

 pressure of, by psychrometric observations, 



English Ixviii-lxxi, 180-193 



Metric Ixviii-lxxii, 194-Joi 



pressure of saturated, 

 over ice 



Dynamic Ixi-lxvi, 173-174 



English Ixi-lxv, 164 



Metric Ixi-lxvi, 169 



over water. 



Dynamic Ixi-lxvi, 175 



English Ixi-lxv, 165-168 



Metric Ixi-Ixvi, 170-172 



(See also atmospheric water vapor.) 

 weight of, 



English Ixvi-Ixviii, 176 



Metric Ixvi-Ixviii, 177-178 



Arc, conversion into time xxiv, 50 



Aschkinass, Rubens and. treatise cited 239 



Astronomical twilight, defined Ixxvii 



duration of Ixxvii-lxxviii, 223 



Atmospheric pressure, in units of force 



xxi-xxii, 36-39 

 .Atmospheric water vapor, 



absorption by, in infra-red Ixxxii, 238 



lines in visible spectrum Ixxxii, 237-238 



August, work cited Ixviii 



Avoirdupois, conversion into metric xxvii, 60 



Babinet, barometric formula for determining 



heights Iviii, 160 



Ball, Frederick, work cited Ixxviii 



Bar, value of defined xxi 



Barometer, 



correction for (in determining height), 

 gravity and weight of mercury, 



English xlviii, 139-140 



Metric lii, 152 



humidity. 



Dynamic li-lii, 151 



English xlviii-xlix. 141 



Metric li-lii, 148-150 



temperature. 



English xlvii-xlviii, i 37-1 38 



Metric 1-li, 146-147 



variation of gravity with altitude, 



English Ixix, 142 



Metric lii. i53 



PAGE 



Barometer. 



determination of height by, 



Babinet's formula Iviii-lix, 160 



Laplace's formula xliv-xlvi 



Dynamic xlix-lv, 144-145 



English xlvi-xlix, 133-142 



Metric xlix-Iiii, I43-I53 



difference in height corresponding to, 



a change of 0.0 1 inch Ivii, 158 



a change of i mm Iviii, 159 



pressures corresponding to temperature of 



boiling water lix-lxi, 161 



reduced to, 

 sea level, 



English xlii-xliii 



Metric xliii 



standard gravity xxxviii-xlii, 127 



English xli-xlii, 128-129 



Metric xlii, 130-131 



standard temperature xxxiii-xxxvii 



English xxxv-xxxvi, 80-99 



Metric xxxvi-xxxvii, 100-122 



U-shaped manometers. 



English xxxvii-xxxviii, 123-124 



Metric xxxviii, 125-126 



value for auxiliary formula in determin- 

 ing height. 



Dynamic 1, 144-145 



English xlvii, 133-136 



Metric 1, 143 



Barometric constant xlv-xlvi 



Baumann, A., treatise cited Ixi 



Beaufort, Admiral, 



weather notation Ixxxvi, 245 



wind scale xxviii-xxx, 70 



Belli, work cited Ixix 



Bemporad, A., treatise cited Ixxix 



Bjerknes. Prof. \'.. work cited Ijv 



Bowie, William, work cited xxxix, Ixxiy 



Broch, work cited xxxv, Ixi-lxii 



Buckingham, Edgar, work cited xix 



Cederberg, I. W., treatise cited.. Ixii 



Centigrade, conversion into Approximate Abso- 

 lute, Fahrenheit, and Reaumur .•.^^'' ^'4 



conversion into Fahrenheit xviii, 10-12 



differences into differences Fahren- 

 heit xix, 13 



near boiling point of water xviii, 13 



thermometric scale defined xv 



Chappuis, Pierre, work cited xxii 



Civil twilight, defined Ixxvii 



duration of Ixxviii, 224 



Clarke, treatise cited xlvi, Ixxv 



spheroid xxiv, Ixxv 



Cloud classification, international. .Ixxxvi, 243-244 

 Coefficient of expansion of air with tempera- 

 ture xliv, xlvi 



Commission Internationale de le haute Atmos- 

 phere nil 



Continental measures of length and equiva- 

 lents XXIV, 48 



Conversion of, 



barometric readings into standard units of 



pressure xxi, 36-39 



linear measures xx, 16-48 



measures of time and angle xxiv, 50-58 



measures of weight xxvii, 60-62 



thermometric scales xv-.xix, 2-13 



wind velocities xxviii, 64-70 



Correction, 



in determining heights by barometer, 

 for gravity and weight of mercury, 



English xlviii, 139-140 



Metric lii, 152 



