

Figure 74. — Theodolite used by Orange Warner Ellis about 1780 for surveying 

 boundary between the United States and Canada in the area which is now 

 Vermont. USNM 309596. 



Greenough, Thomas (1710-1785), Boston, Mass. 

 Surveying Compass ^ made of hickory with engraved paper compass 

 card. Over-all length 11 ft.; dial 5/2 in. in diameter. Central 

 medalHon on card depicts man along shoreline using a Davis 

 quadrant with a schooner offshore, with touches of red. Inscribed 

 in gilt in band around central medallion: "Made and Sold by 

 THOMAS GREENOUGH, Boston, Ncw Eng." Uscd by Joseph Frye 

 in 1762 for surveying his land grant in what is now Fryeburg, 

 Maine. Loan from Laurits C. Eichner, Clifton, N.J., in 1957. 

 USNM 315001. Figure 44. 



138 



