j8o 



INDEX. 



PAGE 



Correction, 



in determining heights by barometer, 



for humidity. 



Dynamic li-lii, 151 



English xlvm, 141 



Metric li-lii. 148-1S0 



for temperature, 



English xlvii-xlviii, 137-138 



Metric 1-li. 146-147 



for temperature of emergent mercurial 

 column of thermometers.... xix, 14 



for variation of gravity with altitude. 



Entjlish -^li>=;. 14-' 



Metric 1". i53 



Davis. H. N., work cited •l>;vii 



Days, conversion into decimals of year and 



angle ;■•.■•• •'J-^'V' 52-55 



conversion of decimals of, into hours, 



minutes, and seconds xxv, 56 



Declination of the sun Ixxvii, 222 



Deflforges, G. E., work cited xxxix 



Degree, length of, at different latitudes. 



of meridian Ixxv, 209 



of any parallel Ixxv, 210 



Degrees, interconversion of Absolute. Centi- 

 grade, Fahrenheit, and Reaumur. . .xvi-xvii, 2-4 



Density of air Ixxx, Ix.xxi, 228-236 



Depth of water corresponding to weight of 



snow or rain Ixxiii, 202-203 



Determination of hei.chts by barometer. 



Dynamic xlix-Iiii. 144-145. '51 



English xlvi-xhx, 133-142 



Metric xlix-lii. 143. 146-153 



Rabinet's formula fur Iviii-Iix, 160 



Dew-point ■. 1^'^ 



vapor pressure corresponding to, 



English Ixx. 180-IQ0 



Metric Ixxi. ig4-i99 



Differences. 



Centigrade to Fahrenheit xix, 13 



Fahrenheit to Centigrade xviii, 13 



Differences, in height, corresponding to 

 changes in barometer, 



English Ivii, 15S 



Metric Iviii, iS9 



Duration of, 



astronomical twilight Ixxviii, 223 



civil twilight Ixxvni, 224 



sunshine Ixxvi, 211-222 



Dynamic heights liii-lvii, IS4-IS7 



Dynamic meters liii-lvii, I54-IS7 



Dyne 'xxiv 



El, value of the 48 



Espy, work cited Ixix 



Expansion, coefficient of, for air. wi;h tem- 

 perature -^liv, xlvi 



Fahrenheit, conversion into Aiiproximate Ab- 

 solute, Centigrade, and Reaumur xvi, 2-4 



conversion into Centigrade ,-'^'^i'' 5-9 



differences into differences Centi- 

 grade xviii. 13 



Fathom, Swedish, value of •..•.••• 4^ 



J'eet, conversion into meters xxiii, 40-41 



per second into miles per hour xxviii, 65 



Ferrel, Wm., treatise cited. 



XXX, xlvi, xlviii. Ixxviii. Ixxix 



Foot, value of, for different nationalities 48 



Formula, Babinet's barometric ...viii-lix, 100 



gradient winds xxx-xxxii, 71-73 



Laplace's barometric xiiv 



vapor pressure, 

 over ice. 



Dynamic Ixi-l.xv, 173 



English Ixi-lxv, 164 



Metric Ixi-lxv, 169 



over water, 



Dynamic Ixi-lxv, 175 



English Ixi-lxv, 165-168 



Metric Ixi-lxv, 170-172 



from psychrometric readings, 



English Ixviii-lxxi, 180-190 



Metric Ixviii-lxxii, 194-199 



Fowle, F. E., work cited 



Ixx.xii, Ix.xxiii, Ixxxiv, Ixxxv 



Geodetical tables Ixxiv-lxxx, 206-226 



Geopotential liii-lv, 154-157 



Gradient winds, 



English xxx-xxxii, 71-72 



Metric xxx-xxxii, 72-73 



Grains conversion into grams xxvii, 61 



Grams, conversion into grains. . . .xxvii. xxviii, 62 



Gravity potential liii-lv, 154-157 



Gravity, standard, defined xxxix 



correction of, for variation with altitude, xxxix 



to standard xxxix-xl 



reduction of barometric readings to stand- 

 ard xl-xlii, 127-131 



relative acceleration in different lati- 

 tudes Ixxiv, 20;. 208 



value of, at sea level Ixxiv, 206 



Guyot, A., treatise cited xxxv 



Hann, J.. Treatise cited. .. .xlvi, Ixxii, Ixxxii, 202 



Hazen, II. A., treati.se cited xxviii 



Height, determination of, 

 by barometer. 



Dynamic xlix-lii, 144-145, 151 



English xlvi-xlix, 133-142 



Metric ...xlix-lii, 143, 146-150, 152-153 

 thermometrical measurement of...lix-lx, 161 



Helmert, work cited Hv 



Henning, F., treatise cited Ixi-lxii 



Heuse. W., treatise cited Ixi 



Holborn, L., treatise cited Ixi 



Hours, conversion into decimals of a day. xxv, 56 

 minutes and seconds into decimals of. xxv, 57 

 Humidity, 



correction for, in determining heights by 

 barometer. 



Dynamic li-lii, 151 



English xlviii-xlix. 141 



IMetric li-lii, 148-150 



relative, 



Fahrenheit Ixxi, 191-193 



Oentigrade Ixxii, 200-201 



term for, in determining density of air, 



English Ixxxi, 229-231 



Metric Ixxxi, 233-236 



Hygrometrical tables Ixi-lxxiv, 164-203 



Hypsometric formula xliv 



Hypsometry xliv-lxi, 133-161 



Illumination intensities, relative Ixxx, 226 



Inches, barometric, conversion into millibars 



xxii, 36-37 



Inches, conversion into millimeters xxi, 16-22 



Infra-red spectrum, absorption by water vapor 



bands in Ixxxii, 238 



Interconversion, nautical and statute miles 



xxiv, 48 



sidereal and solar time xxvi, 58 



International cloud classification. .Ixxxvi, 243-244 

 International meteorological symbols 



Ixxxv, 241-242 



Juhlin, T. T., work cited Ixi 



Kelvin, Lord, work cited xy 



Kilogram prototype xxvii 



Kilograms, conversion into pounds xxvii, 61 



Kilometers, into miles xxiii, 46-47 



per hour into meters per second ... ..xxviii, 69 



Kimball. Herbert II.. works cited Ixxvii, Ixxx 



King, Louis Vessot, work cited Ixxxiii 



Klafter, Wiener (Vienna), value of 48 



Laplace, formula of xliv 



Latitude, correction for. in determining heights 

 by the barometer. 



English xli-xlii, xlviii, 139-140 



Metric xli-xlii, lii, 152 



in reducing barometer to standard gravity, 



English xli-xlii, 128-129 



Metric xli-xlii, 130-131 



Leduc, S. A., work cited xxii, xlvi 



Length, arc of meridian Ixxv, 209 



arc of parallel Ixxv, 210 



continental measures of, with metric and 

 British equivalents xxiv, 48 



