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THE POPULAR SCIENCE MONTHLY 



boro, Mass., for Peter Oliver, one of the crown Judges in the 

 province, and a brother of Andrew Oliver, the Lieutenant-Gov- 

 ernor, in the year 1751." 





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Mr. Harrison says, in concluding his very interesting paper: 

 " The drawing was made under the supervision of S. Wilder, Esq., 

 of New Castle, Pa., a retired iron manufacturer, who worked in 

 this mill in 1818, and gave the writer the principal dimensions and 



