184 



RECORD AND RESULTS OP 





A. M. 



P. M. 







2" 



4 6 



8 



10 



Noon. 



2 



4 



6 



8 



10 



12'' 



January . . 



— 0°.64 



— 0°.24|— 0°.78 



+0°.29 



+0°.56 



+ 0°-7i) 



+0M7 



— 0°.18 



— 0°.06 



+0°.19 



— 0°.13 



— 0°.01 



February . . 



—2.01 



—2.28 



—1.06 



+ 0.74 



+0.74 



+0.94 



+1.96 



+0.81 



+0.42 



+ 0.22 



+0.35 



—0.83 



March . . . 



—2.70 



—3.46 



—2.86 



—0.60 



+0.10 



+1.78 



+5.41 



+3.93 



+1.55 



+0.40 



—1.07 



—2.52 



April . . . 



—1.99 



—2.43 



—1.15 



+0.37 



+0.89 



+2.19 



+2.99 



+1.89 



+0.7^ 



+0.10 



—1.56 



—2.12 



May . . . 



—3.77 



—1.87 



—0.72 



+1.45 



+2.22 



+2.67 



+2.28 



+ 1.96 



+1.53 



—0.38 



—2.07 



—3.31 



June . . . 



—2.70 



—1.33 



—0.47 



+0.07 



+1.19 



+ 1.71 



+2.29 



+1.74 



+1.11 



+0.10 



—1.36 



—2.31 



July . . . 



—2.01 



—1.69 



-1.34 



+0.19 



+1.03 



+0.77 



+2.19 



+1.96 



+0.95 



+0.17 



—0.14 



—2.07 



August . . 



—1.47 



—1.13 



—0.84 



+0.06 



+0.54 



+0.68 



+1.56 



+1.41 



+0.64 



+0.18 



—0.12 



—1.45 



September 



—0.81 



—0.47 



—0.28 



—0.06 



+0.10 



+0.59 



+0.91 



+0.83 



+0.27 



+0.13 



—0.18 



—0.92 



October . . 



—1.08 



—0.98 



—1.17 



—0.59 



+0.17 



+0.89 



+ 1.16 



+1.13 



+0.76 



+0.58 



—0.30 



—0.57 



November 



—1.13 



—1.18 



—0.21 



—0.30 



—0.08 



+0.19 



+0.26 



+0.67 



+0.94 



+0.64 



+0.55 



—0.34 



December . . 



+0.98 



—0.30 



—0.46 



—0.87 



—0.22 



—0.09 



+0.06 



+1.04 



—0.11 



—0.03 



—0.69 



+0.65 



Spring . . . 



— 2.82 



—2.59 



—1.58 



+0.41 



+1.07 



+2.21 



+3.56 



+2.59 



+1.29 



+0.04 



—1.57 



—2.65 



Summer . . 



—2.06 



—1.38 



—0.88 



+0.11 



+0.92 



+1.05 



+ 2.01 



+1.70 



+0.90 



+0.15 



—0.54 



—1.94 



Autumn . . 



—1.01 



—0.88 



—0.55 



—0.32 



+0.06 



+0.56 



+0.78 



+0.88 



+0.66 



+0.45 



+0.02 



—0.61 



Winter . . 



—0.56 



—0.94 



-0.77 



+0.05 



+ 0.36 



+0.55 



+0.73 



+0.56 



+0.08 



+0.13 



—0.16 



—0.06 



P. F. Year . 



—1.61 



—1.45 



—0.94 



+0.06 



+0.60 



+1.09 



+1.77 



+1.43 



+0.73 



+0.19 



—0.56 



—1.32 



V. R. Year . 



—1.74 



—1.55 



—0.90 



+0.17 



+1.06 



+1.81 



+ 1.90 



+1.40 



+ 0.73 



—0.16 



—1.02 



—1.64 



P. K. Year . 



—1.87 



—1.50 



—0.80 



+0.25 



+1..')0 



+2.25 



+2.02 



+1.34 



+0.29 



—0.50 



—1.13 



—1.87 



The diurnal variation, on the average during a year, as deduced for Port Foulke 

 and Van Rensselaer Harbor, shows a remarkable accordance for these localities ; 

 the range at the former place is a little smaller than at the latter, viz: 3°. 38 and 

 3°. 64, which is due to the equalizing effect of open water. The warmest and 

 coldest observing hours are 2 P. M. and 2 A. M. The range at Port Kennedy is a 

 little greater than the above, 4°. 12, on account of its smaller latitude. The spring, 

 summer, autumn, and winter ranges at Port Foulke were as foUows: 6°.38, 4°.07, 

 1°.89, and 1°.67, respectively. In the month of December, when the sun is most 

 depressed below the horizon, the diurnal variation becomes less regular, and 

 approaches towards vanishing altogether. 



Annual Inequality of the Diurnal Fluctuation of the Temperature. 



The annual inequality is best exhibited by the monthly mean values of the diurnal 

 range ; these values for Port Foulke, Van Rensselaer Harbor, and Port Kennedy, 

 are as follows : — 







Da 



ly range of temperature. 











Port Foulke. 



VanR. 



Port Ken. 





Port Foulise. 



VanR. 



Port Ken. 



January, 



1°.4.3 



10.55 



1°.41 



July, 



4°.26 



3°.37 



6°.97 



February, 



4.24 



3.07 



1.49 



August, 



3.03 



5.30 



2.63 



March, 



8.87 



5.66 



9.55 



September, 



1.83 



5.55 ■ 



2.94 



April, 



5.42 



9.09 



7.42 



October, 



2.24 



1.67 



2.18 



May, 



6.44 



7.34 



7.94 



November, 



1.55 



1.00 



2.17 



June, 



4.99 



5.10 



9.60 



December, 



0.18 



1.65 



0.84 



This table exhibits more strikingly the difference in the climate of the two locali- 

 ties which at Port Foulke is the more equable. To obtain the November and 

 December range, which is marked by the accidental irregularities of the tempera- 

 ture, an average value near the hours of maxima and minima has been used. 



