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McMahon, John ListingsIf you cannot find what you want on this page, then please use our search feature to search all our listings. Click on Title to view full description
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McMahon, John Land and Road Surveying Simplified [Autograph Manuscript Notebook]
1864 First Edition Soft Cover Fair with no dust jacket
Australian author? The Author is described on the title leaf as an Architect and a Land and Building Surveyor. Title leaf is type-set, remainder of note-book is hand-written. A portion only of the leather spine remaining. Title leaf partly obscured at inner margin by additional blue paper leaves pasted down at this margin. Staining to endpapers. Binding loose. Contains very neatly drawn ink diagrams and tables. [26], 164, [15] pages. Page dimensions: 155 x 96mm. Almost illegible inscription on front endpaper: "Presented to Vic[?] McMahon by his Aff. father J. McMahon". "Travelling from one place to another a long journey through the bush. The following directions which I forgot to insert in their proper place namely at page 108 I consider of great importance [. . .] I am of course compelled to travel in a zigzag manner, and before setting out I rule my book in the following manner. Journey from A to B (Place named) commenced on the [ ] day of 1864 and completed on the [ ] day of [ ] in company with Mess. J. McMahan, J. Gallie, and George Parrott. [Table] By taking out the latitudes and departures, which should have been done at least every morning before resuming the journey, I find that I have gone 1.3894 miles too far West, and consequently must go that distance in an Easterly direction before I arrive at B and if it were possible to travel in a direct line, that course would be formed thus - By subtracting the sum of the Northings from the Total Northing." - pages 135-136. "The Book had better be headed as above and 4 or 5 pages - one for each days Journey. Time - Early ruled - as the deviations from a direct course must be made mant yimes a day, but the Lat & Departure made esach day should be put into the general table, which is the one given, and next to which on a separate page draw a straight line to represent a meridian, and mark the cardinal points near to the upper end." Selected contents: Surveying; Protraction by Latitude & Departure; To Construct an Isoceles Triangle with the Prismatic Compass; Use of the Line of Lines; Use of the Line of Chords. ; 16mo
Price:
352.50 NZD
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