116 



Calendar of Naivre. 



481 



In place of shading the columns, as in former Diagrams, dark lines are sub- 

 stituted to facilitate the engraving, and represent the depth in inches and 

 tenths of the moisture evaporated in the evaporating gauge, and of rain 

 that fell in the rair-gauge each ten days of the respective months. The 

 dotted line shows the mean temperature ; the line marked d shows the mean 

 point of deposition, or dew-point (see p. 284.); the double line b shows the 

 mean height of the mercurial column in the barometer for each ten days in 

 the two months. The mean temperature for July this year was 57*1^, for 

 August 55' 5° f and for September 50*5°. By turning back to p. 94. it will 

 be observed that the temperature in July last year was 4°, in August 3*6°, 

 and in September 6*1° higher than in the corresponding months this year. 

 The rain which fell this year in the months of July and August, and which 

 might be supposed to affect the ripening of the crops, was 9'6 in. : the depth 

 that fell in the two corresponding months of last year was only 4*6 in. This 

 comparatively low temperature and excessive moisture in the soil might have 

 led to the inference that the ripening of the crops would have been propor- 

 tionally later; and this holds true with regard to the leguminous pai't of the 

 crop, the ripening of fruits, and the progress of vegetation in general, excepit 

 the cerealia, which comprehend what is generally termed the " whitp 

 crop:" but when we take into consideration the structure of the plants 



