10
AMERICAN HISTORICAL ASSOCIATION.
The quantity of aceripigmentum Viz Yellow Arsenic is one poun_d to 80 1b. of Lead but this di:ffers something from the Ductility of the l\fettal the Cornwall Lead requires Less than the Devonshire·' The Height required in Casting is left very obscure, nothing more being Mention'd than about 40 feet woud be required for ·small size to upwards of 80 for the Largest Swan Shot. Nor does said specimen explain anything Satisfactory respecting the formation of Tower more than it. must be constructed high enough to perform the operation of Granulating the shot in its decent by the opposition of air it receives in its fall. RE:MARKS. by Experience I have found a :Much better ::Mode to introduc~ the arsnic and find the white much preferable to the Yellow from it[s J purity in strength. And that a material·differ- E,nce of the Height is required in the Climate of America in the Different Seasons of the Year.
DROP SHOT 1\IANUFACTORY
After being prepared with a proper Building for your purpose if with a communication of a stream of water so much the better. Wherein must be a Capatious high Chimney, or more; large enough to contain 1 or 2 Furnaces or :Melting pots a reverberating Temper furnace and Drying pans provide 2 Casting Tubs strongly Iron whoopd provided with two Brass Cocks one to supply Cold water n.nd the other to Let of the Hot with a strainer near the Bottom. shall add but little of the Construction of these utensils as they are better understood by an artist than Described more than the Kettles should not be less than 2 feet Diameter and not. more than· 1 foot Deep thick and Sound :Made. the Casting Tubs not less than 2 feet 4 inches Diameter and not :More than 2 feet 2 inches above Ground for the Ease of the Caster The Temper Furnace remains a Secret to the Trade only and the Drying pans may be Constructed of any size in proportion to the works in the most convenient situation of the factory.
THOMAS RUSTON TO MOSES AUSTIN
Philacl 11
· , June 1st. 1794.
Srn I have requested Mr Tho• Norwell of Richmond to take out war- rants for the 10,000 acres of land, which you mention, as vacant, in the neighbourhood of the mines, and to forward them to you. As your Brother does not seem inclined, an~ as you have signified that it is not altogether convenient to you, to be concerned in them, l '
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