room for improvement
desert expanse courtesy rear hinge/gutter (BL copy/scan) of
Directions for using the new improved Hadley’s quadrant; with the new method of adjusting the glasses for the back observation... Made by P(eter). and J(ohn). Dollond, Opticians to his Majesty, in St. Paul’s Churchyard, London (1772) : link (google books)
epigram ex (same) : 5 : link
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