24 



The Vegetation of the 



The mean of the year is at 7 A. m., 81; at 2 p. m., 58; at 9 p. m., 75. 

 The highest mean in January at 7 A. m., is 89; the lowest in May, 2 p. m., 

 50. 



The pressure of vapor is the highest in July, 9 p. M., 0.669 of an inch, 

 the lowest in January, 7 a. m., 0.114. 



The means for the year are: 0.316 at 7 a. m.; 0.338 at 2 p. m., and 

 0.340 at 9 p. M. 



Table 5. 



PBECIPITATION, HUMIDITY OF ATMOSPHERE, AND 



PEESSLTRE OF VAPOR. 



MKAN PBBOIP 

 ITATION' 



Inches I" "J^y^ 



KELATIVB HUMIDITY 



OF THE 



ATMOSPHEKE. 



7 A.M. 2 P.M. 9 P.M. 



PKESSUKE OF VAPOK 



IN FBACTIOlfa 



OF INCHES. 



7 A.M.. 2 P.M. 9 P.M. 



December . 

 January .. 

 February . 



March 



April 



May 



June 



July 



August ... 

 September. 

 October ... 

 November 



Winter ... 



Spring 



Summer .. 

 Fall 



Tear 



2.48 

 1.61 

 2.04 

 2.68 

 3.17 

 3.80 

 4.03 

 4.04 

 3.16 

 3.49 

 2.71 

 2.37 



6.13 



9.65 



11.23 



8.57 



35.58 



8 

 7 

 8 

 9 



10 

 10 

 10 



- 7 

 7 



23 

 29 

 26 

 23 



100 



87 

 89 

 87 

 80 

 75 

 73 

 77 

 78 

 81 

 83 

 83 

 81 



88 

 76 

 79 



82 



81 



70 

 71 

 66 

 59 

 52 

 50 

 53 

 53 

 52 

 55 

 55 

 63 



54 

 53 



58 



58 



80 

 81 

 80 

 74 

 70 

 70 

 74 

 74 

 75 

 76 

 75 

 75 



80 

 71 



74 

 75 



75 



.130 

 .114 

 .122 

 .157 

 .240 

 .362 

 .537 

 .626 

 .590 

 .465 

 .276 

 .173 



.122 

 .253 

 .548 

 .305 



.316 



.142 

 .130 

 .145 

 .185 

 .260 

 .390 

 .559 

 .642 

 .610 

 .500 

 .299 

 .193 



.139 

 .278 

 .604 

 .331 



.338 



.134 

 .122 

 .138 

 .177 

 .263 

 .397 

 .567 

 .669 

 .642 

 .492 

 .291 

 .185 



.131 

 .279 

 .626 

 .323 



.340 



CLOUDINESS AND SUNSHINE. 



• The cloudiness of the sky is expressed by figures, which mean the 

 percentage of covering, 100 was noted, when the sky was entirely covered, 

 50 when half, and so on, and when cloudless. The sky is the most cov- 

 ered in December in the morning, and least in August in the evening. 



The mean for the year is 47; the highest for the month is in Decem- 

 ber, 55; the lowest August, 35. 



From the amount of cloudliness cannot be deduced the time of sun- 

 shine during a period, for the sky may be half covered, the sun may shine 

 during the whole day. It is necessary to note the time of sunshine every 

 day. This was done from December 1857 to November 1868 and the re- 

 sult was that we had sunshine 58 p. c. of the time from sunrise to sunset. 



The sunniest months are June and August each with 71 p. c. 



