A Mechanical Text-book: Or, Introduction to the Study of Mechanics and Engineering |
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Common terms and phrases
acceleration angle of repose angular velocity applied Article axes balance bars beam breadth C₁ C₂ called centre of gravity centre of pressure centre of resistance co-ordinates coefficient components counter-efficiency couple cross-section curve cylinder denote diameter divided driving point epitrochoids equal and opposite equation expressed factor of safety figure fixed fluid frame friction given instant instantaneous axis intensity interval joint length line of action line of connection load machine magnitude mean mean effective pressure mechanism moment of inertia moving pieces multiplied oblique ordinates P₁ parallel forces parallel projection perpendicular distance piston pitch surfaces plane polygon position principles produced proportional pulley R₁ radius ratio rectangular relatively represent respectively resultant rigid body screw secondary truss shearing shearing stress single force sliding square straight line structure strut T₁ teeth tension tion traversing velocity-ratio vertical weight wheel
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Page 20 - SCOTT (Rev. Thomas) : A COMMENTARY ON THE BIBLE; containing the Old and New Testaments according to the Authorised Version, with Practical Observations, copious Marginal References, Indices, &c. In 3 vols., royal 410. Cloth, 63/- New Edition. TIMES (John, FSA, Author of "Things not Generally Known," &c.) : THOUGHTS FOR TIMES & SEASONS.
Page 11 - PREVENTION BETTER THAN CURE; Or, The Moral Wants of the World we live in.
Page 4 - Suppose a* =n, then x is called the logarithm of n to the böge a ; thus the logarithm of a number to a given base is the index of the power to which the base must be raised to be equal to the number. The- logarithm of n to the base a is written Iog0 n ; thus log„ii = a; expresses the same relation, as a* = n.
Page 16 - To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides "by the perpendicular distance between them : the product will be the area.
Page 243 - The i:ni. u u. . of a machine is a fraction expressing the ratio of the useful work to the whole work performed, which is equal to the energy expended. The limit to the efficiency of a machine is unity, denoting the efficiency of a perfect machine in which no work is lost. The object of improvements in machines is to bring their efficiency as near to unity as possible.
Page 14 - MANUAL OF CIVIL ENGINEERING : Comprising Engineering Surveys, Earthwork, Foundations, Masonry, Carpentry, Metal Work, Roads, Railways, Canals, Rivers, Waterworks, Harbours, &c. With Numerous Tables and Illustrations. Crown 8vo. cloth. TWENTY-SECOND EDITION. 16s. A MANUAL OF MACHINERY AND MILLWORK : Comprising the Geometry, Motions, Work, Strength, Construction, and Objects of Machines, &c.
Page 21 - Each book of this Series contains within itself all that is necessary to fulfil the requirements of the Revised Code, viz. : Reading, Spelling and Dictation Lessons, together with Exercises in Arithmetic, for the whole year. The paper, type and binding are all that can be desired. THE SCHOOL BOARD MANUALS. (On the Specific Subjects of the Revised Code). By a FORMER HM INSPECTOR OF SCHOOLS. Editor of the
Page 122 - ... the ratio of the mass of a given volume of the substance to the mass of an equal volume of water, in which case it is equal to the specific gravity.
Page 131 - Each of the three forces is equal and opposite to the resultant of the other two ; and each pair of forces are equal and opposite to the components of the third. Hence this rule serves to resolve a given force into two parallel components, acting in given lines in the same plane.