Section. Inaccessible distances where the line partly or entirely is inaccessible, 221 This embraces fourteen cases, or all that can possibly be met in practice. From a given point P to find the distances PA, PB, PC, in the triangle ABC, whose sides A B, B C, and CD are given, this embraces three possible positions of the observer at l', 238 SPHERICAL TRIGONOMETRY. Properties of spherical triangles. Solution of right angled spherical triangles, Page 7211*9, Napier's rules for circular parts, with a table and examples, 363 364 Oblique angled spherical triangles, 365 Fundamental formula applicable to all spherical triangles, Definitions and general properties of refraction, parallax dip, greatest azimuth, refraction in altitude, etc., etc., Find the variation of the compass by an azimuth of a star. Find latitude when the celestial object is off the meridian, Letters to the British and American Nautical Ephemeris offices, Remarkable proof of a Supreme Being. Page 721*24, True time by equal altitudes; example. Page 7211*25, True time by a horizontal sundial, showing how to construct one, Longitude; how determined for Quebec and Chicago, by Col. Longitude by the Drummond light and moon culminating stars, Method II. First meridian pass through the most Westerly station,. 239 Method III. First meridian pass through the most Northerly station, 260 Offsets and inlets, calculation of, To calculate an extensive survey where the first meridian is made a base line, at each end of which a station is made, and calculated by the third method, 264 Where the original posts or stakes are lost, law to establish, 264b 264c 264d Find at what time polaris or any other star will be at its greatest Find its greatest azimuth or elongatión, Find when polaris or any other star culminate or pass the meridian, .264e 261f How to know when polaris is above, below, East or West of the Page 71, 264g How to establish a meridian line. System of rectangular surveying, What the United States law requires to be done, Base lines, principal meridians, correction or standard lines, East and west section lines, random and true lines, . Limits in closing on navigable waters and township lines, Page 7211*35. Base line and primary triangles, secondary triangles. How triangles Method of protraction by a table of tangents, etc. Area cut off by a line drawn from a given point, 405. By a line From a given point P within a given figure to draw a line cutting off 420 From a given triangle to cut off a given area by a line drawn through 420a To divide any quadrilateral figure into any number of equal parts, Form of field-book used by the English and Irish Boards of Public Additional, and corrections, geodetical jurisprudence, laying out GEODETICAL JURISPRUDENCE. 421 306a 307 United States laws respecting the surveying of the public lands, New streets (continued 421). Page 72в10,. SIR RICHARD GRIFFITH'S SYSTEM OF VALUATION. Field-book, nature and qualification of soils. 309g and 309, Von Thaer's classification of soils, table of, . Classification of soils with reference to their value,.. Tables of produce, and scale for arable land and pasture. 309c, 309p, 309q 309r Manure, market, condition of land in reference to trees and plants, 309% Valuation of buildings, classification of same, measurement of, 310j Horse power, modulus of, for overshot wheels, 3100 310p valuation of .310v to 310A Geological formation of the earth. Table, 72b52, Sir William Logan's report on six specimens of dolomite, Limestones, cements used in Paris, artificial cements, plaster of Paris, Composition of grains, straws, vegetables, and legumes, .310G Analysis and composition of the ashes of miscellaneous articles, Including antimony, arsenic, bismuth, cobalt, copper, nickel, zinc, 3.01 310 310K 79 140 146 Hydraulic mean depth of a rectangular water course of a circle, Solid matter in some of the principal places. Page 72197, Daily supply in various cities, Conduits, or supply mains, Discharge throw pipes, and orifices under pressure, VENA CONTRACTA and coefficient m of contraction. P. 72B100, .310c* .310E* Experiments by Poncelet and Lebros. DuBuats, Smeaton, Brinley, Formula by D'Arcy incorrect, page 264, but here corrected, Spouting fluids, Water as a motive power. Available horse-power, 3100 310B 310s Sanitary hints, Rawlinson's plan, Supply of guano will soon be exhausted.. On the steam engine, horse-power. Admiralty rule, work done by PRESSURE OF FLUIDS ON RETAINING WALLS. Centre of pressure against a rectangular wall, cylindrical vessel, dams Page 72112, REVETMENT WALLS. Wall having an external batter, Table for surcharges, by Poncelet, Walls in masonry, by Morin, 310w3, dry walls, .310T 310t 310г, 310c* .31002 310w4 31076a 310x10 1.3109 Vauban, Rondeiet, English engineers, and Colonel Wurmbs. P. 72x115. Blasting rock, Chicago, dam at Jones' Falls, Canada. PILE DRIVING, COFFER-DAMS, AND FOUNDATIONS, MR. MCALPINE'S formula derived from facts, • When trees should be cut, natural seasoning, artificial do., Napier's At Woolwich, Croton Water Works, Forts Warren and Richmond. VICAT'S METHOD. GROUTING, BY SMEATON.-Iron Cement. Cement for moist climates. Page 728122,. Concrete in London and United States, . Beton-Mole at Algiers, Africa,.. PRESERVATION OF IRON, |