CONTENTS, 



List of Illustrations 

 Preface 



PABB 

 V 



Tart I. —TEMPERATURES 



Record and discussion of the temperature 

 Tabulation of record . 



Discussion of the annual variation of the temperature of the air 

 Discussion of the diurnal variation of the temperature of the ai 

 Table of hourly values of the variation of temperature . 

 Connection of the lunar phases with the changes of temperature 

 Effect of the winds on the atmospheric temperature 

 Temperature of the soil . 

 Temperature of the sea . 

 Table of monthly means of temperature registered by modern Arctic expeditions, by Captain 

 McClintock .....•••• 



3* 



1 

 is 

 22 

 23 

 27 

 28 

 30 

 32 



30 



Tart II.— WINDS. 



Record and discussion of the direction and force of the wind— Introductory remarks 



Record of the observations 



Method of reduction 



Average velocity of the resulting wind . 



Average velocity of the winds 



Relative frequency of the winds . 



Relative quantity of air passed over the place of observation 



I'otation of the winds . 



Occurrence and duration of storms 



39 

 40 

 02 

 66 

 67 

 69 

 70 

 71 

 73 



Part 1 1 1 . —ATMOSPHERIC PRESSURE. 



Record and reduction of the observations for atmospheric pressure— Introductory remarks 

 Record of the observations . 



Comparison of the readings of the aneroid and mercurial barometers 

 Resulting mean 4-hourly and mean monthly readings of the mercurial barometer in the months 

 of September, lSf.7, and February and April, 1*58 . 



70 

 81 

 99 



100 



