.. Mathematiqal Inflriiments. 



William Williams 



Mathematical Inftrument Maker, 



Has to fell at his Shop in King-Street, twoDoorsEaft of 

 theSi^n of A.dmiral Vernon, near , the Head cf the 

 Long-Wharf, BOSTON. 



A Large AfTortment of Hadley's and Davis's Qiia- 

 drants, hanging and ftanding Conij>atTes, in Bafs 

 and Wood ! Gauging and Surveying Inltrumawts, C*ifes 

 of Inftruments, large and fmail VtiiptCilve Gialfcs, in 

 Ivory, Wood and Fifli-fkin, plotting Scales and Pi on Vic- 

 tors, Gunter Scales and Dividers, Surveyors Chains. Ar- 

 tificialrMagnets with Cafes, Sand Giaifes frr^m 2 Hours 

 to J Minute, Inftiunients of a new ConftRj<5fion to mea- 

 fit re Boards, Qiiarter jWaggoners, Atkinion's Epitonuj, 

 Wilifon's ditto, Patfron's Navigation, SeamansAiii/Unts, 

 Callenders, Mariners CompafTcs retStified, Youn^ Man's 

 Companion, Journal Bocks, Ink-Powder, Q^nlls^-Paper, 

 an Aflortinent of Brafs Pocket CompaHes with & wnji- 

 out Cards, Box Rules, Slates and Pencils, Penknives, 

 Jack knives, Sec. 



All Sorts 'of Mathematical Infiruments are made and 

 repaired by the above Wdliam Williams. Thofe who,; 

 will favour him with their Culfom,may depend upon be- 

 ing well ufed, and have their Work done with Fidelity 

 and Difpatc-h. 



Figure 48. — Advertisement of William Williams in The Boston Gazette, March 12, 

 1770. Photo courtesy Harvard University Library. 



95 



