A System of Land Surveying and Levelling: Wherein is Demonstrated the Theory with Numerous Practical Examples, as Applied to All Operations, Either Relative to the Land Surveyor, Or Civil and Military Engineer, Band 1
K. Chapman, 1815 - 164 Seiten
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A B C D A B C is equal A B D A D C acre angle A B C angle C D B angles B A D angular point B A C bisect boundary calculating centre chain error circumference circumscribing circle consequently the angles crooked line decimal diagonal diameter dimensions distance divided double the angle draw ellipse field figure given point inches intersection isoceles triangle join lands length line A B Logarithm mark measure method multiply Natural Numbers offsets opposite parallel lines Parallel Rulers parallel to A B parallelogram polygon PROBLEM proof lines PROPORTIONAL protraction radius ratio rectangle right angles right line Scots segment semicircle square station line straight line subtense subtract Table Theor THEOREM trapezium Trapezoids triangle A B C tryo Vulgar Fraction
Seite xi - If a straight line touch a circle, and from the point of contact a straight line be drawn at right angles to the touching line, the centre of the circle shall be in that line.
Seite xi - IN a right-angled triangle, if a perpendicular be drawn from the right angle to the base, the triangles on each side of it are similar to the whole triangle, and to one another.
Seite 42 - The decimal of ^ = -4375 ; and the logarithm of this decimal is = -1.640978 or, subtract the logarithm of the denominator from the logarithm of the numerator, and the remainder will be the logarithm, which, being that of a decimal fraction, must always have a negative index.
Seite x - The angle at the centre of a circle is double the angle at the circumference on the same arc.
Seite 46 - Add the logarithms of the second and third terms together, and from the sum subtract the logarithm of the first term, the remainder will be the logarithm of the fourth term.
Seite 33 - The sign of equality, called equal, or equal to, signifies that the quantities between which it is placed are equal to each other.
Seite 112 - Ltldvati, say what is the area of a circle, the diameter of which is measured by seven?
Seite 5 - Prob. 7. Through a given point C, to draw a line parallel to a given line AB.