36 



Dr. C. Smallwood^s contributions to 



Monthly Means, 



Monthly Range. 



January . . 

 February . 

 March . . , 

 April .... 



Inches. 

 1.350 

 1.484 

 1.401 

 1.381 



Inches. 



May 1.349 



June 0.815 



July 0.637 



August 0.770 



September . 

 October. . . 

 November . 

 December . 



Inches. 

 1.023 

 1.014 

 0.902 

 0.994 



The lowest, range (or the least difference) was in July, and 

 this has held good for a series of years. January for a long period 

 shows the greatest range, but the month of February 1861 shows 

 a greater range than January ; the mean range for a series of 

 years has been found to be 1.032 inches, which is 0.060 of an 

 inch less than the yearly range of 1861. January shows the 

 highest mean of the year and June the lowest. The mean reading 

 of the barometer for the Winter Quarter was 29.883 inches, for 

 the Spring Quarter 29.827 inches, for the Summer Quarter 29.769 

 inches, and for the Autumnal Quarter 29.813 inches. 



Thermometer. — The mean temperature of the air for this year 

 varies but very slightly from the mean temperature of a series of 

 years, but the mean temperature indicated 1°89 degrees less than 

 the mean temperature of last year (1860), and 0°16 of a degree 

 only more than the mean annual temperature of a long series of 

 years; the mean temperature for the year 1861 being 41°72. 

 The highest reading was on the 9th of June at 3 p.m. and indic- 

 ated 99°7 degrees ; the lowest reading was at 6 a.m. on the morn- 

 ing of the 8th of February, and indicated — 37°1 degrees (below 

 zero), giving a yearly range or climatic difference of 13 6° 8 degrees. 



The warmest day of the year was the 10th of June, the mean 

 temperature of the day was 81°1 degrees; at 11 a.m. the thermo- 

 meter stood at 87°8 degrees, and at 3 p.m. 96°0 degrees, and at 

 4 p.m. 95°8 degrees; at 10 p.m. it stood at 76°7 degrees and it 

 fell to 60°3 in the night, which was clear and calm, the terrestrial 

 radiator indicated 57° degrees. The coldest day of the year was 

 the 8th of February, the mean temperature indicated — 28°5 

 degrees (below zero) ; below is a record of the cold term of January 

 and February. 



