Figure 46. — Compass card from a wooden surveying compass " Made by Thomas 

 Greenough, Boston, New England." In collection of the writer. 



The compass card in each of these five instruments is identical, 

 designed for use in the mariner's compass (see fig. 46). A gentle- 

 man in the dress of about 1740 stands on the shore using a Davis 

 quadrant. Offshore in the harbor is a schooner of the 1750 period. 

 Minor features of the scene are touched up in red, presumably 

 printed, since they are consistent in all of the cards. 



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