Figure 32. — Wooden graphometer used by Rev. Eleazar Wheelock (1711-1779) 

 about 1769 for surveying the area of Dartmouth College in Hanover, New 

 Hampshire. The hardwood block is covered with a brass plate with brass 

 sighting bars mounted on a swivel and a spirit level under a brass strip on edge 

 of instrument. The instrument is 8^8 in- long, 4% in. wide, and /le in. thick. 

 In collection of Dartmouth College Museum. 



i n which they worked. Even allowing for those probably destroyed 

 in the natural course of events, one cannot help but wonder what 

 has happened to the remainder. 



A list of the surviving wooden instruments is given in the Appen- 

 dix (p. 153). Many of these wooden instruments bear signatures 

 or other marks that permit identification of their makers, but a 

 number of specimens have been found that are not signed. In 

 most instances they show evidence of professional workmanship, 

 and they may have been the work of known craftsmen. One or 

 two examples are obviously homemade by unskilled amateur 

 practitioners. 



70 



