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, Volumen1
K. Chapman, 1815 - 164 páginas
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A B C acre answering applicable base bisect boundary calculating called centre chain chord circle circumference column consequently construct contain convenient decimal describe diagonal diameter difference dimensions distance divided draw drawn English equal error example expressed extremity feet fence field figure foot fourth given point greater ground half inches intersection join lands length less line A B Logarithm manner mark measure meeting method multiply necessary offsets opposite parallel perpendicular polygon position practice PROBLEM proof PROPORTIONAL protraction quantities radius ratio respective right angles rule scale segment sides square staff station lines straight line subtract survey Table taken taking Theor THEOREM third triangle true whole
Página xiii - 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.
Página xiii - 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.
Página 36 - 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.
Página xii - The angle at the centre of a circle is double the angle at the circumference on the same arc.
Página 38 - 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.
Página 25 - The sign of equality, called equal, or equal to, signifies that the quantities between which it is placed are equal to each other.
Página 106 - Ltldvati, say what is the area of a circle, the diameter of which is measured by seven?
Página 5 - Prob. 7. Through a given point C, to draw a line parallel to a given line AB.