Meteorology of N'eto Haven. 



235 



is doubtless in part the result of the long series of observations by 

 M'hich the influence of irregular causes has been eliminated, and this 

 curve doubtless aiibrds a near approximation to the average climate 

 of New Haven. 



The following table shows the highest as well as the loAvest tem- 

 peratures observed for each month of the year, together with the 

 date of the observation and the name of the observer. These observ- 

 ations were generally made at fixed hours, Mhich were not always 

 those of the highest or lowest temperature. In such cases, in order 

 to obtain the true maximum or minimum, a small correction has been 

 applied which was deduced from the table of the diurnal variation 

 given on page 232, 



The principal results of the preceding tables are graphically repre- 

 sented by curves on the accompanying plates, 



Plate I exhibits the mean daily curve of temperature for each 

 month of the year, and also for the average of the entire year accord- 

 ing to the table on page 230. The hours of the day are shown at 

 the top and bottom of the page, and the degrees of temperature upon 

 the right and left margins. The general resemblance of the curves 

 for the different months is quite remarkable ; and especially the fact 

 that no two of the curves intersect each other. 



Plates II and HI exhibit what Major Genex'al Sabine designates as 

 chrono-isothermal lines, being designed to show the temperature at 

 the several hours of the day on each day of the year, Plate II ex- 

 hibits the isothermals which are comprised between the mean temper- 



