Instructions in Practical Surveying, Topographical Plan-drawing, and Sketching Ground Without Instruments |
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accuracy adjusted altitude angular distance apparent level ascertained azimuth beam compasses calculated centre chain clinometer colour compass correct cosec degree determine difference distant object divided division drawing drawn elevation employed error exactly Fcap 8vo feet field-book figure ground height hence hills horizontal angle horizontal plane inches Indian ink intersections irregular laid latitude length light limb longitude maps means measured ment meridian method miles military sketches mountains nature nearly necessary needle oblique observed obtained offsets pacing paper parallax parallel parallel ruler pencil perpendicular persons plane-table Plate plot points Post 8vo practice principles protractor reduced reflecting instrument right ascension roads ruler scale screws Second Edition sextant shade sides slopes spherical excess square miles struments supposed survey surveyor taken tangent telescope theodolite tion Trapez triangles trigono true vernier vernier scale vertical vols Woodcuts
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Page 233 - ... of books, and with a view to obviate the complaint, that a check might in consequence be raised to their intellectual advancement, Mr. Murray has determined to publish a series of attractive and useful works, by approved authors, at a rate which shall place them within reach of the means not only of the Colonists, but also of a large portion of the less wealthy classes at home, who will thus benefit by the widening of the market for our literature : and the " Colonial Library " will consequently...
Page 233 - Works, partly of new editions of popular Publications, at the lowest possible price. It is called for in consequence of the Acts which have recently passed the British Parliament for the protection of the rights of British authors and publishers, by the rigid and entire exclusion of foreign pirated editions.
Page 234 - Letters' by a young and beautiful and witty English spinster, whose work will cause a sensation hardly inferior to that which attended the bursting of the ' Old Man's Brunnen Bubbles.'"— Quarterly Review.
Page 154 - Levelling Staves. — Two mahogany station-staves generally accompany the spirit-level ; they consist of two parts, capable of being drawn out when considerable length is required. They are divided into feet and hundredths, or feet, inches, and tenths, and have a sliding-vane, with a wire placed across a square hole in the centre, as shown in Fig.
Page 76 - ... quarter of an inch in depth at several times, allowing sufficient intervals for the fluid to stain the stone in that plane, 4, 3, 2, 1, it has fallen to at the last abstraction. These stains will present a series of horizontal lines or contours, 4, 3, 2, 1, all round the surface of the stone ; and if we examine the stone thus prepared, looking down upon the top, we shall see that the steepness and REPRESENTATION OF THE GROUND.
Page 234 - NAVY, and to all Economists in space or pocket, who, having limited chambers, and small book-shelves, desire to lay up for themselves a concentrated Library, at a moderate expenditure. To ALL WHO HAVE FRIENDS IN DISTANT COUNTRIES, as an acceptable present to send out to them.