240 



PKOCEEDINGS OF THE 



[June, 1890. 



JUNE 26th, 1890, 



The President in tlie Chair. 



The following paper was read : 



THE SEASON OF 1889-^90. 



BY J. K. BLACKMAN. 



In accordance with a suggestion made at the March meeting of the Society, 

 I have cjUected some data touching the recent remarkable season and its ef- 

 fects upon the flora of Charleston. But before going into results, it may be 

 well to record the facts which illustrate how abnormal have been the meteoro- 

 logical conditions for the six months ending April 30, 1890. 



Taking up first the subject of temperature, it will be seen by an examination 

 of the following table, compiled from the Montnly Eeports of the United 

 States Signal Office at this place, that while there was an enormous excess in 

 January and February, there was an actual deficiency in the temperature of the 

 month of March of 39", as compared with the normal temperature of that 

 month for fifteen years past. 











•< 



Mean Temperature of the month, , 



59° 



61° 



56° 



65° 



Average Mean Temperature for fifteen years, 



50° 



52° 



57° 



64^ 



Excess of temperature for the month, 



284° 



214° 





13^ 



Deficiency of temperature for the month, 







39° 





Lowest temperature, 



36° 



39° 



25° 



47° 



Date of lowest temperature, 



17th 



10th 



16th 



2d 



Total excess of temperature, January 1st to 



April 



30th, 472'^ 





It is also noteworthy that the minimum temperature for March, 25°, was 

 lower than at any time for the same period since 1874, when the self register- 

 ing thermometer was estabUshed at this station, and as no record was kept of 

 the minimum temperature up to that time, it is impracticable to tell how Jong 

 a period has elapsed since the temperature of March has reached so low a point 



