[lunar distance calculation form]A printed form laying out the computation needed for finding the longitude by Lunar distance observations, printed both sides. One side completed in ink for an observation dated September 5th 1767<br>
unavailable
<div class="fn value">
Robert Bishop</div>
1768<div style="display: none;">date QS:P571,+1768-00-00T00:00:00Z/9</div>
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