Figure 31. — Equal altitude telescope, 17 in. long, made and signed by Henry 

 Voight (1738-1814) of Philadelphia. USNM 311772. 



on Market Street where he sold a variety of instruments. In the 

 June 5, 1797, issue of The Federal Gazette he announced that, in 

 addition to jewelry, clocks and watches, he "also had for sale 

 mathematical instruments in cases very compleat; Surveyors Com- 

 passes and Theodolites; ship's Quadrants; Fishing Rods and Reels; 

 Billiard Balls and sheet ivory; silver and plated coach, chaise and 

 chair Whips." 



64 



