THE METEOROLOGY OF EDINBURGH. 71 



The corresponding dates for the lowest mean daily temperature were November 22, 

 1880, and March 26, 1872. The range between the extreme daily temperatures was 

 greatest 56°*0 in 1826 and least 34°*5 in 1883. The absolute maximum temperature 

 in the seventy-five years under review was 87°'7 on August 5, 1868, and the lowest 5°'0, 

 this value being recorded on January 31, 1845, January 29, 1848, and December 24, 

 1860, the latter observation being taken at Marchhall, which is within 200 yards of the 

 place where observations are now made. The extreme range in the shade temperature 

 was 82°'7. The earliest date at which the maximum temperature occurred was April 30 

 in the year 1862, and the latest, September 25 in 1895, the next latest being on Sep- 

 tember 8, 1890. The extreme dates on which the absolute minimum took place were 

 November 7, 1868, and March 24, 1834. The annual range was greatest, 77°, in 1826 

 and 1848, and least, 48°, in 1862. The lowest absolute maximum was 70°"0 on April 30, 

 1862, and the highest minimum, 24 c- 5, on December 28, 1863. 



Tables XIV. to XXIV. give the reduction of nearly all the temperature observations 

 taken in Edinburgh. 



Table XIV. shows the highest mean daily temperature in each month from 1857 to 

 1896, Table XV. gives the lowest mean temperature, and Table XVI. the range. Table 

 XVII. shows the greatest daily range of temperature during this period. 



Table XVIII. gives a general synopsis of the thermometric observations from 1840 to 

 1896. Table XIX. summarises some of the data contained in the above tables. 



Table XX. gives all the instances of a maximum temperature below 25°'l and of a 

 minimum temperature above 60° "9. 



Tables XXI. to XXIV. give the results of the reduction of Adie's observations 

 taken at Canaan Cottage. The original observations are given in extenso in the 

 Edinburgh Journal of Science. Table XXI. shows the average maximum, minimum, 

 and mean, temperatures, and the mean daily range of temperature. 



Table XXII. gives the extreme shade temperatures and the extreme range of 

 temperature. 



Table XXIII. gives the highest night minimum and lowest day maximum, and 

 Table XXIV. the extremes in the mean daily temperatures. The date of the occur- 

 rence is given in each instance. 



Temperature Variability 1840 to 1896. 



The mean daily variability of temperature is given in Table XXV. In the calcula- 

 tion of the values, the mean temperature was assumed to be the arithmetical mean of 

 the daily maxima and minima. The calculation of the variability of temperature 

 consists in extracting the difference between the day to day values. Thus, if the mean 

 temperatures of two successive days were respectively 60° and 55°, the difference, viz., 

 5°, would represent the variability. Table XXVI. summarises the data given in Table 

 XXV., along with some additional particulars. 



VOL. XXXIX. PART I. (NO. 6). O 



