404 



Results of Makekstoun Observations, 1844. 



The olisei'vations of the dry and wet bulb thermometers were usually made about 1"° before the hour of 

 Gottingen mean time, that is about 9™ after the Makerstoun hour ; t!ie observations of the barometer were made 

 about 1" or 2" after the hour of Gottingen mean time, that is about 11™ or 12" after the hour at Maker- 

 stoun. Tlie hour, astronomical reckoning, without the additional minutes, of Makerstoun mean time is given 

 in the Tables : in the remarks, the observation has been supposed to be made 1 0" after the Makerstoun hour, 

 and civil reckoning is used. 



TABLE I. — Daily, Weekly, and Monthly Means of the Temperature of the Air, as deduced from 

 the readings of the Dry Bulb Thermometer, for 1844. 



The observations of the dry and wet bulb thermometers, from pages 172-308, are not corrected for the errors 

 of the thennometers ; the coiTections have been applied for the above and following Tables. 



Annual Variation of Temperature. — The monthly means at the foot of Table I. are slightly different from 



the ti-ue monthly means, on account of the want of observations on the Simdays ; the difference, however, may 



be obtained with sufficient accuracy from the observatioas of the register maximum and minimum thermometers. 



The monthly mean temperatures deduced from all the obsei-vations of tlie register thermometers are as follow : — 



Jan. Feb. March. April. May. June. July. Aug. Sept. Oct. Nov. Dec. 



36°-06 32°-73 38°-73 47°-25 48°-27 55°-20 56°06 5.5°-63 52°-86 46''-36 42°-07 32°.14 

 when the obsei-vations of the register thermometers on Sundays are omitted, the means are — 

 36°-63 32'47 38°-60 47°-08 48-69 55°-26 56°07 55°-87 53°02 46°-33 41°-88 31°-73 



The differences between the two scries are — 

 + 0°-43 +0'''26 +0"-13 +0'17 +0°-03 -0°-06 -0°01 -0"-24 -0°16 +0''-03 +0°19 ■f0°-41 



