EicInrerticilltiterspacB represents, one degree Fahrenheit, aird the fractional parts of a degreeare indicated as exactly as possible in the plotdng of flip curves. "Each fiMu 

 '. feSKpresented by a slightly liea^jer line. The transy.ense interspaces inclosed by the heavier lines represent periods of ten days each, as indicated by the dates on the 

 leMand sli of 'the plate. This lighter transyecse lines, initerjsediate between the heavier ooes, ace intended to fepresent the mean of, each ten days, and the curves of temper* 

 SimrB aiE pl(5Red"v5th reference to these Ikes. The left-hand vertical dlwsion is dcYoted to the air temperatures for iSSi, 1882 and 1883, the middle division to the sttc&B 

 "VSSSt tempsatores. for the same years, thus pgrmifllng: of a compaiisoit of Die two; and the right-hand division to the water temperatures for 1884 and 1885, 



