453 



VIII. NOTES ON THE OBSERVATIONS OF TEMPERATURE AT THE 

 WINTER QUARTERS OF THE "DISCOVERY." 



BY 



DR. CHARLES CHREE, F.R.S. 



TABLE or CONTENTS. 



Page 



1. Diurnal inequality of ordinary temperature corrected for non-cyclic change 453 



2. Fourier coefficients for diurnal inequality 454 



3. Hottest and coldest days 455 



4. Differences between minimum and ordinary temperatures throughout the day 456 



5. Frequency of occurrence of lowest minimum for the day throughout the 24 hours 457 



6. Means of daily maxima and minima and corresponding ranges 458 



7. Mean from daily maximum and minimum and its relation to mean from 2-hourly ordinary readings . . 459 



8. Greatest and least daily ranges 460 



9. Extreme monthly temperatures 461 



10. Kesults from six lowest minima for each observation period 461 



1. Table I. gives the diurnal inequality of temperature in degrees Fahrenheit, as derived from the 

 2-hourly readings of the ordinary mercury thermometer, corrected for non-cyclic or a-periodic change. 

 The non-cyclic element was eliminated in the usual way by the correction 



where r a and r^ are the mean readings answering to the first and second midnights of the day, while n is 

 the hour interval since the first midnight. 



TABLE I. Diurnal Inequality of Temperature. 



