IV 
.GE 
Table XV. Mean Temperature of every Year, 1826-1869 . . ,14 
Mean Temperature of tbe Year; and instances of Highest and Lowest 
Mean Yearly Temperatures..15 
EXCESS OR DEFICIENCY ABOVE OR BELOW THE AVERAGE )F 
THE MEAN TEMPERATURE OF EVERY DAY, MONTH, Ad 
YEAR. 
Tables XVI. to XXVII. Excess or Defect of Temperature on every Day 
in each Month during the Years 1826-1869. 
Method of forming the Tables of Excess or Deficiency of Temperature of 
every Day.* . . . 9 
Great Differences shown from Day to Day. .9 
Instances of Months in ‘which the Daily Temperatures have been always, or 
almost always, above or below the Average.* .9 
Table XXVIII. Greatest Daily Excess or Deficiency in each Month of the 
Years 1826-1869 ..20 1 
Extreme Departures of Temperature from the Average in each Month in 
forty-four Years ... . p 
Effect of Extremes of Temperature upon Vegetation . . . . . ; 2 
Periods which particularly require the Attention of the Horticulturist . 3 
List of lengthened Periods of Excess and Deficiency of Temperature in the 
forty-four Years . . . ..23 7 
Largest Periods of Excess and Deficiency of Temperature in each Month . 7 
Table XXIX. Departure above or below the Temperature of each Month 
in each Year ..28,) 
Indication in the Table of somewhat Warmer Winter Months, and some¬ 
what Colder Summer Months than formerly . . . . . ) 
Warmest and Coldest Months.) 
Groups of Warm and Cold Years . . . . . . .30, 
DAILY RANGES OF TEMPERATURE ON EVERY DAY 
OF THE YEAR. 
Tables XXX. to XLI. Ranges of Temperature on every Day in each 
Month during the Years 1826-1869. 
Conditions under which Animal Life is best Preserved .... 
Injurious Effect upon Plants of great Alternations of Temperature . 
Long Series of Observations required for the determination of the Average 
.4 
- 
(35P 
ik 
Daily Range of Temperature in every Season 
