An essay, wherein a method is humbly propos'd for measuring equal time with the utmost exactness; without the necessity of being confin'd to clocks, ... in order to discover the longtitude at sea. Book Discussion
An essay, wherein a method is humbly propos'd for measuring equal time with the utmost exactness; without the necessity of being confin'd to clocks, ... in order to discover the longtitude at sea. (Paperback)
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