CONTENTS. 
PAGE 
TEMPERATURE. 
Date of Commencement of Regular Observations.3 
: Observations : by whom made.3 
Subjects of Observation: Times of Record.3 
.Definite Times to which the Observations have been referred in the 
Reduction ............ 3 
1 Importance of determining the Average Temperature of every Day . . 4 
Instruments employed : their Position ....... 4 
i Examination of Discordant Records.4 
Process of Reduction . . . ..4,5 
! Corrections for Diurnal Range ......... 5 
1 Daily Corrections for Application to the Means of Maximum and Minimum 
Temperatures. 6 
Further Examination of Discordances . . . . . . .7 
Formation of the Probable Mean Daily Temperature .... 7 
Arrangement of Tables of Mean Daily Temperature.7 
Total Number of Observations treated . . . . . .7 
Tables I. to XII. Mean Temperature of every Day, and Extremes of Mean 
Temperature for every Day in each Month during the Years 1826-1869. 
Large Differences between Values on Consecutive Days .... 9 
Method of Deducing the most Probable Temperature of every Day in the 
Year.9 
Law of Change of Temperature during the Year . . . ' . .9 
Table XIII. Adopted Mean Temperature of every Day in the Year . 10, 11 
Table XIV. Mean Temperature of every Month and Year in the Years 
1826-1869 . 12, 13 
Number of Times for Occurrence of Coldest and Hottest Monthly Tempera¬ 
tures in Different Months.14 
Monthly Mean Temperatures.14 
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