Rudimentary treatise on mensuration and measuring |
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Σελίδα 115
... telescope , resting on two supporters , which in shape resemble the letter Y ; hence the name of the instrument . The lower ends of these supporters are let perpendicularly in a strong ₹ brass bar , which carries a compass box C ...
... telescope , resting on two supporters , which in shape resemble the letter Y ; hence the name of the instrument . The lower ends of these supporters are let perpendicularly in a strong ₹ brass bar , which carries a compass box C ...
Σελίδα 116
... telescope for parallax and collima- tion . 2. The adjustment of the bubble tube . 3. The adjustment of the axis of the telescope perpendicularly to the vertical axis . 1. The adjustment for parallax and collimation . Move the object ...
... telescope for parallax and collima- tion . 2. The adjustment of the bubble tube . 3. The adjustment of the axis of the telescope perpendicularly to the vertical axis . 1. The adjustment for parallax and collimation . Move the object ...
Σελίδα 117
... telescope round its axis . 2. The adjustment of the bubble tube . - Move the telescope till it lies in the direction of two of the parallel plate screws , and by giving motion to these screws bring the air - bubble to the centre of its ...
... telescope round its axis . 2. The adjustment of the bubble tube . - Move the telescope till it lies in the direction of two of the parallel plate screws , and by giving motion to these screws bring the air - bubble to the centre of its ...
Σελίδα 119
... telescope , when adjusted for observation , and there- fore was apparently on the same level ; the distance of the instru- ment from the castle was 4 miles , required the correction for curvature and refraction , that is , the true ...
... telescope , when adjusted for observation , and there- fore was apparently on the same level ; the distance of the instru- ment from the castle was 4 miles , required the correction for curvature and refraction , that is , the true ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
12 feet 20 feet A B C AMEN CORNER axis Baker's Land base bottom width centre chains Charles Tomlinson chord circle circular circumference content in cubic correction for curvature cubic feet cubic foot cubic yards curve decagon decimals depths diagonal diameter distance Duodecimals Engineering Surveying equal EXAMPLES feet 6 inches feet long figure find the area find the content find the solidity foot fore sights formula frustrum given ground half height instrument Land and Engineering length level book measured method miles multiply NOTE offsets parabola perpendicular polygon Prob PROBLEM pyramid quantity quarter girt radius railway cutting refraction required the area Required the content RULE RULE.-Multiply S. P. Woodward screws segment side slopes SLIDING RULE spirit level square feet square yards staves subtract Table tangent telescope trapezium VIRTUE BROTHERS W. D. Hamilton zone
Δημοφιλή αποσπάσματα
Σελίδα 3 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 51 - The sphere may be conceived to be formed by the revolution of a semicircle about its diameter, which remains fixed.
Σελίδα 5 - Is. 6d. 76. GEOMETRY, DESCRIPTIVE, with a Theory of Shadows and Perspective, and a Description of the Principles and Practice of Isometrical Projection, by JF Heather.
Σελίδα 51 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Σελίδα 4 - SHIP-BUILDING AND NAVIGATION. 51. NAVAL ARCHITECTURE, by J. Peake. 3s. 53*. SHIPS FOR OCEAN AND RIVER SERVICE, Construction of, by Captain HA Sommerfeldt. Is. 53**.
Σελίδα 145 - EMIGRANT'S GUIDE TO TASMANIA AND NEW ZEALAND, by James Baird, BA [In Preparation. FINE ARTS. 20. PERSPECTIVE, by George Pyne. 2s. 27. PAINTING ; or, A GRAMMAR OF COLOURING, by G. Field. 2s. 40. GLASS STAINING, by Dr. MA Gessert, with an Appendix on the Art of Enamel Painting, &c.
Σελίδα 81 - Large and plain articles are usually measured by the square foot or yard, &c; but enriched mouldings, and some other articles, are often estimated by running or lineal measure •, and some things are rated by the piece. In measuring of Joists...
Σελίδα 86 - GLAZIERS' WORK. — Glaziers take their dimensions either in feet, inches, and parts ; or feet, tenths, and hundredths. And they compute their work in square feet. In taking the length and breadth of a window, the cross bars between the squares are included. Also, windows of round or oval forms are measured as square, measuring them to their greatest length and breadth, on account of the waste in cutting the glass.