THE FUTURE OF OUR COTTON MANUFACTURE. 313 



In the chart which I have 

 referred to, I have compared 

 the relative humidity of the 

 atmosphere at New London, 

 Conn., with that of Augusta, 

 Ga., from General Greely's ta- 

 bles, and I have added the data 

 of New Bedford, Mass., from 

 the private records which have 

 been kept for a very long pe- 

 riod by Mr. T. R. Rodman and 

 his father. I have also com- 

 piled some data relating to 

 Atlanta, Ga. 



The general results derived 

 from these two charts prove 

 that the mean temperature of 

 Atlanta is 12f Fahr. above 

 that of New London, with 13 

 less per cent of relative hu- 

 midity, and subject to a vastly 

 greater variation day by day. 

 Augusta, perhaps the principal 

 center of the cotton manufact- 

 ure of the South, yields a lit- 

 tle different result : the mean 

 temperature of New London 

 through the year is 49f ; at 

 Augusta, Ga., 64"4, a differ- 

 ence of a little over 15 in heat. 

 The mean relative humidity at 

 New London is 74'53 per cent ; 

 the greatest variation in the 

 year, 23*4 per cent; the mean 

 variation, 10 per cent. At Au- 

 gusta, Ga., however, the mean 

 relative humidity is 71'42 ; the 

 extreme variation 55 per cent, 

 and the mean variation 37'45 

 per cent in relative humidity, 

 or nearly four times as much 

 as at New London.* 



* Since this paper was written, through 

 the action of the New Bedford Board of 

 Trade, Mr. R. C. P. Coggeshall has been 



vol. xxxvi. 20 



