344 



INDEX. 



Self-registering instruments required, 



109 

 September, constancy of temperature 



in, 193 

 Shifting of the epocli of maximum 



cold, 194 

 Short series, irregularities of, 193 

 Sierra Nevada, 105 

 Solar cliuiate, 104 



pure, apparently subverted, 

 105 

 Solar radiation, 317 

 Solar spots, variation in the frequency 

 of, compared with the secular varia- 

 tion of tenjperature, 314, 315 

 Stations, geographical distribution 

 of, ISl, 183 

 increase of, best means of ascer- 

 taining the separate effects on 

 the climate, Hi4 

 Successive means of temperature, 



302 

 Suurise and sunset, explanation of, 

 how computed, 113 

 forraulse to compute, 113 

 Supposed arrest of increasing tem- 

 perature in May, 193 

 Surgeou-Greneral of the U. S., system 

 of meteorological observations es- 

 tablished by, 111 

 Systematic changes, 302 

 Systematic progression of tempera- 

 ture, 302 



Table of daily fluctuation for Albu- 

 querque would answer for most 

 stations situated within the great 

 interior basin, 162 

 Table of extreme heat and cold on 



the same day, Albany, N. Y., 199 

 Tables of consolidated mean annual 



temperatures, 312, 313 

 Tables of corrections, xiv, xv 

 Tables of daily average temperatures, 



use of, 183 

 Tables of daily temperature, enabled 



to construct, 194 

 Tables of differences, 1 10 

 Tables of observed extremes of tem- 

 perature for every month, 202-225 

 Tables of resulting mean tempera- 

 tures, explanations and remarks 

 on the consolidated, xi-xv 

 Tables of resulting temperatures, 167, 



169 

 Tables of the average temperature of 



each day of the year, 1^4-192 

 Tables of the mean annual tempera- 

 ture, 306, 307, 308, 309, 310 

 Tabulation of mean annual tempera- 

 ture, object of, 228 

 Temperature, accidental irregulari- 

 ties, 193 

 causes affecting, 109 

 coincidences, 193 

 comparison of decrease between 

 certain limits of the U. S. in 

 different seasons, 103 

 comparison of the average annual 

 direction of the wind and the 

 secular variation in the tem- 

 perature, 316, 317 

 comparison of the rain-fall and 

 the secular variation in the, 

 315, 316 

 constant in September, 193 

 corrections, results of, 104 

 daily fluctuation of, 107-119 



Temperature, daily variation due to 

 the sun's altitude, 109 



decrease, connected with de- 

 crease of pressure, 104 



diagram illustrating the relation 

 of the direction of the wind 

 and the secular variation in, 

 317 



difference at elevations, different 

 laws to this effect, 104 



distribution, different systems, 

 105 



effects of, proximity of Gulf 

 stream on, 105 



effect of the cold current between 

 coast and Gulf stream on, 105 



exceptional and remarkable dis- 

 tribution in tlie western part 

 of California, 103 



equal, in summer in Florida, 105 



fluctuations at Portland, 193 



for the middle of the mouth, cor- 

 rection required, 169 



high winter, associated with com- 

 paratively great precipitation, 

 106 



hourly means of, 155 



in February, rapid rise of, 193 



interpolation required at' some 

 stations, 155 



in November, rapid decline of, 

 193 



in May, supposed arrest of in- 

 creasing, 193 



irregularity in the epoch of the 

 annual fluctuation of the, 199 



march of, in December appa- 

 rently normal, 193 



mean, subtracted from observed 

 temperature at any hour, 110 



no intimate connection between 

 the solar spots and the, 314 



object of tabulation of mean 

 annual, 228 



of freezing point of water in July, 

 227 



positive sign indicates a higher 

 and a negative sign a lower, 110 



prevalence of westerly winds ou, 

 105, 106 



rapid rise in February of, 193 



range of the Pacific and Atlantic 

 coast considered, 106 



remarkable depression, in No- 

 vember, 193 



regularity in February and March 

 of the progression of, 193 



secular variation of, compared 

 with the variation in the fre- 

 quency of solar spots, 314, 315 



signs employed in table of aver- 

 age differences in, 112 



summer, of the coldest place on 

 tlie Pacific compared with that 

 of the corresponding place on 

 the Atlantic, 106 



table of average differences in, 

 112 



to be studied in connection with 

 other phenomena. 317 



true distribution of, near the 

 surface, desired, 104 



unusual depression in May of, 

 193 



what corrections would be re- 

 quired in addition to that in 

 reducing to sea level, 104 



winter, contrast between the 

 Atlantic and Pacific coasts, 106 



Temperature records, .scarcity of regu- 

 larly continued, 109 

 Temperature charts, detailed expla- 

 nations of, 103 

 Temperatures, tables of bi-hourly, 

 hourly, and semi-hourly mean, 

 121-136 

 tables of consolidated mean an- 

 nual, 312, 313 

 Terms of hot or cold, 184 

 Thermal anomaly in May, 193 

 Thermograph, 109, 110 

 Time of mean temperature in the 

 Arctic regions, 157 

 in the temperate regions, 

 157 

 Time of observations, xii, xiii 

 Time of sunrise in different latitudes, 



113, 114, 115, 116 

 Time of sunset in different latitudes, 



113, 117, 118, 119 

 Time when greatest cold will occur, 



109 

 Time when greatest heat will occur, 



109 



Toronto results, cold hours are most 



liable to disturbances of 



temperature in the cold 



months, 163 



confirmed by those of other 



stations, 163 

 warm hours are most liable 

 to disturbances of tem- 

 perature in the warm 

 montlis, 163 



Uniformity or range in the low lati- 

 tudes, 158 

 United States, eastern part, 105 

 western part, 105 



Variability in tlie mean temperature 



of any one day, 197 



of temperature in winter more 



than double that of summer, 



164 



of the annual fluctuation at 



Toronto, 194 

 of the temperature at any hour 

 of the day from the normal 

 value of that hour, 162 

 Variation in the annual means, 319 

 Variations in the munthly means of 

 temperature, 227 



Walker, Prof. F. A., Superintendent 

 U. S. Census, furnishing the base 

 chart, 106 

 Warme^t period of day at San Fran- 

 cisco influenced by the sea breeze, 

 160 

 Wasliington Territory, northwestern 



part of, 105 

 Wind, comparison of tlie secular 

 variation in the temperature 

 and the average annual direc- 

 tion of the, 3l"6, 317 

 deflection of the, 317 

 diagram illustrating the relation 

 of the secular variation in 

 temperature and the direction, 

 317 

 direction of, 317 

 Winter season, changes from the 

 normal temperature, 193 



Zig-zig line of temperature, 193 



