MECHANICS.] 



INDEX TO VOL. I. 



1243 



Moon's motion, 690. 



Morin's experiments on turbines, 835. 



Mortars, their strength, 799. 



Motion, circular, 740. 



Motion down and up inclined planes, 



737. 



Motion, eccentric, 861. 

 Motion in fluids, the resistance to, 766. 

 Motion in machinery changed transversely, 



887. 



Motion, its communication, 882, el aeq. 

 Motion, laws of Newton, 747. 

 Motion of heavenly bodies the result of 



two simple forces, 782. 

 Motion of projectiles, 738. 

 Motion of translation, 747. 

 Motion parallel in steam-engines, 873. 

 Motion, reciprocating, 894. 

 Motion, rectilinear, uniform, 734. 

 Motion, rectilinear, variable, 734. 

 Motion, reversing, 896. 

 Motion, rotary, 858, 876, 894. 

 Motion stopped by friction, 899. 

 Moulding apparatus, 783. 

 Moulding metals, 783. 

 Mountains, the height computed by the 



barometer, 770. 

 Moving forces, 742. 

 Mud-holes in boilers, 851. 

 Muscles as levers, 720, 780. 

 Muscles not controlled by the will, 818. 

 Muscles, their action, 818. 

 Muscles, their force, 818. 

 Muscular forces of men and animals a 



source of power, 781. 

 Muscular power of men and animals, 818. 

 Musical-boxes, 839. 

 Musical instruments, 783. 



NEUTRAL axis of beams, 802, 808. 

 Newcomen, the earliest engine available 



was his, 871. 

 Newton's contrivance for measuring 



elasticity, 745. 



Newton's laws of motion, 747. 

 Newton on the vena contracta, 764. 

 Nicholson's hydrometer, 757. 

 Non-condensing engines, 864. 

 Notation, mechanical, proposed by Bab- 



bage, 784. 

 Nutcrackers as levers, 719. 



OAK, African, crushing pressure, 802. 

 Oak, data for calculating the strength 



797. 



Oak, English, crushing pressure, 802. 

 Oak, tab!;- of strength, 810. 

 Oar a leter, 719. 

 Oar, the movement of an, 818. 

 Oblate spheroid, 910. 

 Offsets, or scales for measuring, 795. 

 Oil, machinery for producing, 783. 

 Oiling apparatus in machinery, 885. 

 Oiling reduces friction, 902. 

 Oils, vegetable, machinery for preparing, 



783. 



Opt-al instruments, 783. 

 Ordnance ; thickness does not always 



constitute strength, 799. 

 Ore-stamping and crushing at mines, 878. 

 Ores, machinery for preparing, 783. 

 Orifices, velocity of fluids through, 764. 

 Ounce weight, 691, 905. 

 Outlines, drawing, 784. 

 Overshot water-wheels, 828. 

 Overshot-wheel, where applicable, 832. 

 (Jz as a moving force, 818. 



PACKING-RING of the piston of a steam- 



engine, 857. 

 Paddle-feathering, 881. 

 Paddle-wheel described. 881 . 

 Paddle-wheels, shock from waves, 815. 

 Paddle-wheels, steam-engine for driving, 



875 



Palladium used for the construction of 



balances, 723. 



Paper-making machinery, 783. 

 Parabola, the curve described by fluids 



issuing from orifices, 764. 

 Parabola the path of a projectile, 739. 

 Parabola, the proper longitudinal section 



of a beam, 809. 

 Parabola, the surface of rotating fluids, 



762. 



Paraboloids, 910. 



Parallel lines, their use in drawing, 786. 

 Parallel motion in steam-engines, 873. 

 Parallelogram of forces, 694. 

 Parallelogram of velocities, 738. 

 Paris, gravity in its latitude, 747. 

 Particle material, 689. 

 Pascall's experiments on water rising in 



tubes, 769. 

 Paving of London represents more labour 



thau the largest pyramid, 779. 

 Paving, York, crushing pressure, 802. 

 Pear-tree wood, data for calculating the 



strength, 797. 



Pen, a drawing instrument, 795. 

 Pencil-compass, 795. 

 Pendulum as a standard measure of 



length, 692. 

 Pendulum beating seconds in London, 



747. 

 Pendulum, conical, to regulate the speed, 



838. 



Pendulum, conical, to regulate the velo- 

 city of engines, 863. 

 Pendulum of a clock, 838. 

 Penknives, how three may be balanced on 



the point of a needle, 713. 

 Pennyweight, 691, 905. 

 Perch or pole, 692, 906. 

 Perpetual screw, 893. 

 Persian wheel for raising water, 835. 

 Pet-cocks in steam-engines, 856. 

 Philosophical instruments, 783. 

 Pictures, by hand and by photography, 



784. 



Piercing apparatus, 783. 

 Pigments, machinery for preparing, 783. 

 Pile. driving engine, 767. 

 Pillar, a vein in it an element of fracture, 



801. 



Pincers as levers, 719. 

 Pine, American, crushing pressure, 802. 

 Pine, table of strength, 810. 

 Pinion and rack, 728, 892. 

 Pinion form of teeth, 893. 

 Pinions partly geared, 895. 

 Pins of a chain, their shearing strain, 816. 

 Pipe branching out of another, mode of 



drawing, 790. 

 Pipe, the velocity of water through a, 



764. 



Pisa, Leaning Tower of, 714. 

 Piston, how its reciprocating motion is 



converted into rotary, 858. 

 Piston in steam-engines, its construction, 



857. 



Piston-rod, its action, 856. 

 Pitch of a screw, 788. 

 Pitch of a screw, method of cutting. 897. 

 Pitch of a screw-propeller considered, 



881. 



Pitch of toothed wheels, 888. 

 Pitch pine, table of strength, 810. 

 Pitch-radius of a wheel, 899. 

 Plan or horizontal projection, 786. 

 Plane, inclined, 719, 731, 737, 744. 

 Plane surfaces in drawing, 784. 

 Plane, what is called so, 719. 

 Planet and sun-wheel, 899. 

 Planets, their motion, 690. 

 Planing iron, 880. 

 Planing machinery, 783. 

 Planing-machines, methods for moving. 



895, 896. 

 Planing metals, machinery for, 783. 



Plans of railway or canal works, scales 



employed, 794. 

 Plates of which boilers are constructed, 



850. 



Plates, stronger by corrugating, 808. 

 Platinum used in the construction of 



scale-pans, 723. 



Plug, fusible, for ascertaining the water- 

 level in boilers, 852. 

 Plumb-line, 710. 

 Plummer blocks, 884. 

 Pneumatics, 768, et seq. 

 Poinsot's theory of couples, 707. 

 Poker, a lever, 719. 

 Polar diameter of the earth, 747. 

 Pole or perch, 692, 906. 

 Polishing by emery, 902. 

 Portland stone, crushing pressure, 802. 

 Post, wooden, a knot is an element of 



fracture, 801. 

 Pottery-ware, machinery for preparing, 



783. 



Pounds, troy and avoirdupois, 691, 905. 

 Power consists of two elements, 815. 

 Power conveyed by machinery, its con- 

 ditions, 882. 



Power, human, its various exertions, 818. 

 Power in steam-engines, 879. 

 Power, its communication, 880. 

 Power, its sources and application, 781, 



817. 



Power measured by a dynamometer, 900. 

 Power, mechanical, defined, 882. 

 Power, mode of estimating, 780. 

 Power, muscular, 818. 

 Power of a horse, 818. 

 Power of a man, 818. 

 Power of gravity constant, 780. 

 Power of the wind, 820. 

 Power, regulating, 782. 

 Power required in manufactories, 880. 

 Power (See also Force). 

 Power, standard of, 780. 

 Power, steam (See Steam Power). 

 Power, the means of deriving and com- 



municating it, 780. 

 Power, the object of dynamical mechanics, 



779. 



Power wasted by friction, 782. 

 Power, what is, 780. 

 Powers, mechanical, 719. 

 Press, hydrostatic, 749. 

 Presses, 783. 

 Presses, hydraulic, effects of internal 



pressure on, 799. 

 Pressure and pulleys, 743. 

 Pressure and tension, 693. 

 Pressure applied to elastic fluids, 768. 

 Pressure, atmospheric, 768. 

 Pressure, centre of, 754. 

 Pressure, explanation of the term, 750. 

 Pressure-giving machinery, 783. 

 Pressure, internal, its effects, 799. 

 Pressure, its transmission through fluids, 



748. 



Pressure of different fluids, 752. 

 Pressure of fluids on concave surfaces, 



752. 



Pressure without motion, its law, 882. 

 Pressures, fluid, 751. 

 Pressures, on triangles and rectangles, 



751. 



Pressures, resultant of all the, 753. 

 Priming in boilers, what it is, 851. 

 Printing-machinery, a peculiar form of 



screw applied in, 896. 

 Printing-presses, 783. 

 Projectiles, motion of, 738. 

 Projectiles, range and height, 739. 

 Projection, horizontal, 785. 

 Projection of curves, 786. 

 Projection on plane surfaces, 785. 

 Projections are not representations of the 



actual appearances, 791. 

 Propellers, paddle-wheels, 881. 





