OP ARTS AND SCIENCES. 



39 



Connecticut and Rhode Island, compared with the greater distance 

 between them where they turn more to the north, suggests an advance 

 oblique with the front of the stonn. Taking east by south as its 

 direction of motion, we find an average velocity from southern Ver- 

 mont to Cape Cod of about thirty-seven miles an hour ; but if the 

 quarter-hour front-lines are to be trusted, this rate varied from over 

 fifty in southern New Hampshire down to about twenty on Cape 

 Ann, Mass. 



Fig. 4. 



The frequent mention of the storm's dividing as it approached an 

 observer is not fully explained by the observations thus far gathered. 

 It probably means that the intensity of the storm varied along the 

 front line, and varied again as the storm advanced ; future observa- 

 tions must decide this. The individuality of the storm was, on the 

 whole, well preserved : certain features were observed with consider- 

 able uniformity at a good number of widely separated stations, and if 

 the observers had all been equally watchful, the record of this uni- 

 formity would doubtless have been much increased. To illustrate 

 this statement, the following extracts are made from the records, as 

 far as possible in the observer's words. 



Clouds before the Rain. — The high, forerunning cirro-stratus over- 

 flow was observed well at several stations ; it is of especial interest 



