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[Page 17]
General Instructions For Surveying
It is judged necessary, in Order that future Surveyors may profit to the Fullest Extent, by your Discoveries & Operations; that they may be able to Appreciate the Authorities on which the Geography of the several Portions of the Coast rest; that those Authorities should not only be pointedly marked in Your Chart but that a Register should also be Kept in the nature of a Log Survey Book; that by a reference to these Authorities at any future Time, the whole, or any part of your Proceedings may appear clear & Intelligible, both to yourself & to others: so that, in Cases where you have not been able, either from Weather or Accident to compleat the Trigonometrical or Observational Process, others may be enabled to compleat what you have begun without the delay of going thru' the whole Process anew.
The form of such a Log Survey Book is contained in these Instructions; [see Page 16] on which we have to observe, that the most pointed of attention is expected to be shewn to the Course & distance & that the Times of taking Angles & Bearings applicable to Trigonometrical Purposes be carefully noted in the Book, to the minute of Time at which they were taken: in order that such Courses & distances, subject to Correction, by difference of Latitude, or otherwise, may form a kind of uninterrupted series of Bases for the determination of the Objects around you. And no opportunity should be neglected, of detecting the Error of the Course by Frequently noting the Bearings of the Extremes of the Land, each way, and by setting