instrument was originally invented about 1716 by Roger Cotes, 

 professor of astronomy at Cambridge, as a simple instrument for 

 the determination of time. 



Deposited in the U.S. National Museum by the Smithsonian 

 Institution in 1939. USNM 311772. Figure 31. 



Washington, General George (1732-1799), Mount Vernon, Va, 

 Compass Sundial described by the donor as having been presented 

 to Gen. George Washington by General Braddock on the retreat 

 through Paris Gap, Fairfax County, Va. Gift of Samuel Keese 

 in 1902. USNM 9842. 



Field Glass, brass tube in three sections, length closed 9 in., opened 

 22K in. Diameter of object lens 1% in., of ocular lens 1}8 in. With 

 original case of russet leather, which is 9)^ in. long and IVi in. in 

 diameter. Maker not known. Stated to have been used by 

 Washington during the Revolutionary War at the campaign of 

 Valley Forge. 



According to related correspondence, when not in use the 

 instrument was carried by the General's body servant, Billy Lee. 

 The General presented the field glass to Major Lawrence Lewis, 

 his favorite nephew, in 1799, the last year of his life. 



Purchased by the U.S. Government from the Lewis heirs in 1878 

 and transferred to the U.S. National Museum in 1883. USNM 

 92424, 92425. Figure 82. 



Spyglass or Telescope, made of wood, 9-sided, wrapped throughout 

 with twine, 62 in. long. Brass mountings for object and ocular 

 lenses made by "Cole, Fleet Street, London." Diameter of object 

 lens 2% in., diameter of ocular lens 1 in. 



The maker, Benjamin Cole (1725-1813), was the third genera- 

 tion of instrument makers of the same name. Other instruments 



Figure 82. — Brass field glass in case of russet leather, stated to have been used 

 by General George Washington at Valley Forge. USNM 92424, 92425. 



149 



