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Determined Boundaries Pennsylvania: He determined boundaries Pennsylvania the boundaries of Pennsylvania and the line between New York and Massachusetts. From 1779 to 1782 he was pro-:essor of astronomy in the University of Pennsylvania and afterward trustee and vice-provost. In 1792 he was made director of the United States mint by President Washington. After three years he resigned and returned to scientific work. He succeeded Franklin as president of the American Philosophical Society in 1790.
WITH GARDENS a sense of enclosure is important. On small lots the boundaries may be those of the property or even plantings or other pleasant features on a neighbor's property, for when I speak of boundaries I mean not those of the lot but those that limit the view. On larger grounds the boundaries to views may be well within the property lines.
In 1763 he laid out the 12-mile radius around Newcastle, which forms the boundary between Pennsylvania and Delaware, accurately with instruments of his own construction, and Mason and Dixon accepted his results as final. In 1769 he located the point where the 41st parallel of latitude, the boundary between Pennsylvania and New York, strikes the Delaware River. The same year the Pennsylvania legislature appropriated £200 toward the observations of the transit of Venus.
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