An explanation of a new construction and improvement of the sea octant and sextant, containing, a ... method of adjusting and rectifying those instruments for use both at sea and land .... Illustrated by four copper-plates. By B. Martin.
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| Format: | eBook |
| Language: | English |
| Series: | Eighteenth century collections online.
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| Online Access: | Full text online |
| Item Description: | "The public are indebted solely to my son, J.L. Martin, for the invention .." (Preface); he was awarded patent number 1088 in 1774. Reproduction of original from the British Library. Electronic resource. |
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| Physical Description: | 2 unnumbered pages, 37, 1 unnumbered page, fold.plates ; 8⁰. |