Study of the Neio York Obelisk as a Decayed Boulder. 145 



York (January 22, 1881). As it fortunately happened that the 

 ])eriod covered by Hutcheson's observations began in the autumn 

 of that year, it would be interesting to compare the similar obser- 

 vations made by Draper at tlie same time in this city. As conclu- 

 sions from averages are also often deceptive, it appears desirable to 

 present the daily observations at both localities. In the following 

 table, I have therefore reduced the daily ranges in temperature 

 during those five months, at each place, in Fahrenheit degrees, 

 between the maximum in the sun and the minimum in the shade. 



Daily Ranges in Temperature (F.) between Maximum in Sun 

 and Minimum in Shade. 



