J- 



405 HORIZONTAL WIN D-M I L L, 



■They were unequal in their heights ; For, whilfl: two of 

 ■them rofe ahnoft to the zenith, others did noti ei^ceed 45^ 

 They changed colours alternately from a fiery red to a 

 purple; from that to a yellow; from yellow to a flame co- 

 lour; and then to red again. Thefe changes were fo fud- 

 den and quick that they affefted the fenfe fo ftrongly as to 



raife horror. 



** At a quarter after nine, the columns changed their 

 perpendicular pofition to an ohlique one, and immediately 

 began to move towards the Weft, They foon blended to- 

 gether, and formed a dirty red {ky, tinged with yellow, 



" N. B, There were no ftreamers, corrufcations, tre 

 mulous or dancing motions, as are common to fuch phae 

 nomena. This was a quiet one, except that it changed 

 colours, and moved towards the Weft, as already defcribed. 



, A 



140 



■«■> 



*' During the appearance the air was uncommonly fe*» 

 vere and chilling; and, though the Heavens were ferene 

 and befpangled with ftars, the atmofphere felt damp and 

 heavy. 



" A little before ten o'clock, the whole funk below^ our 

 horizon and difappeared." 



Mr, Thomas Gilpin hath prefcnted a model of a Horizontal 

 Wind-mill; and ivrites to the Society as follo^ws. 



HAT to obviate the difficulty of turning the houfe, 



or frame, of common wind-mills to the wind, he 



had contrived a model of a horizontal wind-mill, which 

 he had fixed to three pumps, as he apprehended the chief 

 ufe of fiich a mill would be the applying it to raife water 

 out of mines and quarries, and likewife out of wells, or 

 brooks for watering meadows. He thinks alfo it might be 

 further applied to anfwer the various ufes of other wind- 

 mills, without the inconvenience in turning or fliifting 



them as the winds fhift. 



" The 



