788 Mr . hutton’s Calculations , See. 
convenient ways of meafurement adapted to the cireum- 
llances with which the nature of the furvey may hap- 
pen to be attended. 
A map of the country about Schehallien is hereunto 
annexed, to convey a general idea of the nature ox the 
ground, and for the better illuftration of the defeription 
given in the former parts of this paper. This map is. tab* 
XI. 
Woolwicft, 
April 27, 1778* 
