INDKX TO VOL. I. 



tsioa. 



Propellers, mm. 814. 875, 881. 



Propulsion of TOM!*, 875. 



Protractor, * drawing ia>(rument, 791 



Fuller. 719, 729. 



Puller, ma.-l.mt 



Puller. praMure on the axis, '. 



Pullets, conical, thrir action, I 



Pulley*. fast and loose, 885. 887. 



Pulleys, frii-tion on, 903. 



Pulleys, ruli-s for calculating speed*, 886. 



Pulleys, Mt of. 886. 



Pulley to convey motion, 885. 



Pump (air) (See Air-pump). 



Pump (feed) {See Feed-pump). 



Pump for regulating pcttl. sol. 



Pump. forcing described, 774. 



Pump, household, 773. 



Pumping, action of man in, 818. 



Pumping by tem power described, 879. 



Pumping. engine, power of a, 781. 



Pumping, form of engine employed in, 



H74. 



Pumping in docks, 878. 

 Pumping in water-works, 878. 

 Pumps, 783. 



Pump* worked by windmills, 825. 

 Punch, what is a, 815. 

 Punching a hole in metal, force required, 



817. 



Punching-machinery, 783. 

 Punching, the shearing strain in, 815. 

 Pushing. bearing used for screw-propellers, 



902. 



Pyramid, centre of gravity of a, 718. 

 Pyramids, a labour that might have been 



belter applied, 779. 



QUADKANT, the, 907. 

 i Quadrupeds, centre of gravity of, when 



walking. 715. 

 Quintcnz'a balance, 724. 



RACK and pinion, 892. 

 Rack first proposed for railroads, 881. 

 Racks and pitrtly-geared pinions, 895. 

 Racks, machines for cutting, 898. 

 Rails, question of deflection in, 603. 

 Rails, the best section of, 808. 

 Railways, scales employed for plans, 795. 

 Railway trains, method of arresting, 901. 

 Ram, hydraulic, for raising water, 83ti. 

 Ramsden's balance, 723. 

 Ratchet-wheel for ribrating motions, F9.*i. 

 Rays of light considered in drawing, 786. 

 Raxor-grinder's machine, 720. 

 Reaction, 693. 



Reciprocating movement, 894. 

 Rectangle*, pressures on, 751. 

 Refraction, atmospheric. 

 Regulating-powers in machinery moved 



by weight, 838. 



Regulators for water-wheels, 833. 

 Relief valves in steam-engines, 856. 

 Kennie's experiments on friction, 902. 

 Reservoirs, 833. 



Resistance to motion in fluids, 76C. 

 Rest or equilibrium, fi'.'O. 

 Resultant of force, 693 695. 

 Reversing by cross straps, 896. 

 Reversing by toothed gearing, 896. 

 Reversing motion, 896. 

 Rhine tidal mills. 828. 

 Riba to strengthen rails, 808. 



'ody. 69. 

 Rigid body in equilibrium. 700. 



estimated speed ... 

 Riveting -machinery. 783. 

 Rivet* used in constructing boilers, 850. 

 Roberval's bal.no 

 Rods, a manner of coupling, 816. 



K !- (.. itaBfth i. ,. . ,,.. -..i 



Rolling iron, 800. 



Boob, aodott form, of, 778. 



Rope-dancers, 715. 



Rope, friction of coils, 903. 



Rope-making machinery, 783. 



Ropes, rales for computing the strength, 

 800. 



Ropes, their tension calculated, 796. 



Rotary engines, 870. 



Rotary motion converted into reciprocat- 

 ing, 894. 



Rotary motion conveyed through ma- 

 chinery, 883. 



Rotary movement, how produced by the 

 motion of t!i piston-rod. 858. 



Rotating fluid, its equilibrium, 761. 



Rotation, 690, 741, 717. 



Rotation, how to reverse the direction, 

 886. 



Rotation, rapid, in shafts, decreases the 

 strain, 815. 



Rotation, uniform, Fraud's apparatus, 

 839. 



Rowing, an operation in which man ex- 

 erts the greatest power, 818. 



Rowing, power of man in, 818. 



Rudder of a ship, to find its maximum 

 effect, 767. 



Rules and examples for measuring a 

 circle, 908, 



Rules and examples for comparing scales 

 of temperature, 907. 



Rules and examples for measuring time, 

 907. 



Rules for finding the area of a circle, 

 908. 



Rules for finding the area of a parallelo- 

 gram, 908. 



Rules for finding the area of a sector, 

 909. 



Rules for finding the area of a trapezoid, 

 908. 



Rules for finding the area of a triangle, 

 908. 



Rules for finding the area of an ellipse, 

 909. 



Rules for finding the circumference, 908. 



Rules for finding the cubic contents of a 

 sphere, 910. 



Rules for finding the mensuration of the 

 superficies, 90tt. 



Rules for finding the solid contents of a 

 prism, 910. 



Rules for finding the surface of a cylinder, 

 908. 



Rules for finding the weight of boilers, 

 910. 



Rules for measuring a cone, 910. 



Rules for measuring a curved figure, 

 909. 



Rules for measuring a sphere, 910. 



Rundle of a pulley, 729. 



SAFETY-VALVE in steam-boilers, 852, el 

 teq. 



Sail, first rude notion of a, 819. 



Sail of a ship, its action, 820. 



Sailor's art, 819. 



Sails, computation of the angle at which 

 should beset. 821. 



Sails of windmills, 822. 



Sails of windmills, their angle and dimen- 

 sions, 822. 



Sails propelling chariots, 821. 



Sandstone, table of friction, 902. 



Savery's engine, 871. 



Sawing-machinery, 783. 



Saving-machines, methods for moving, 

 895. 



Scale, a drawing instrument, 795. 



Scale. drawings, their object, 795. 



Scales (See Balances). 



Scales, circular-drawing, 795. 



Scale* most convenient for architectural 

 drawings, 795. 



Scales most convenient for mech.inical 

 drawing*, 795. 



Scale* used in drawings of land-surrey*. 

 795. 



Scissors are letern. 7 1 '.>. 



Screens thai ..selves after being 



pressed duwn, 7 IX 



Screw, 719, 7:il. : 



Screw, a machine, 783. 



Screw-curves, drawing, 788. 



Screw. cutting machines, method of mo- 

 tion in, - 



7-18. 



Screw-gearing for the lathe, 897. 



Screw micrometer, 898. 



Screw, peculiar form applied to printing 

 machinery, 896. 



Screw, perpetual, 893. 



Screw. presses, 783. 



Screw-propeller, 881. 



Screw-propeller, pitch of screw, flfll. 



Screw-propellers, form of bearing used, 

 9U2. 



Screw-propellers, steam-engine for driving, 

 875. 



Screw-threads, their forms generally 

 agreed, 899. 



Sea currents, 742. 



Section-lining or hatching, 790. 



Sections, drawing, 7.~'i. 



Seed-crushers, methods for moving, 895. 



Seine tidal mills, - 



Set-square, a drawing instrument, 794. 



Shades to complete drawings need no geo- 

 metrical projections, 793. 



Shading drawings, , 



Shading, how may be effected, 792. 



Shadowing, circular, 791. 



Shadowing drawings, 791. 



Shaft, a part of machinery, considered, 

 883. 



Shaft, mill (See Mill-shaft). 



Shafts, deflection an important element of 

 weakness, 815. 



Shafts, friction on, 902. 



Shafts, hollow or tubular, their advan. 

 tage, 814. 



Shafts of paddle-wheels, the shocks from 

 waves on the, 814. 



Shafts, prime movers should be stronger 

 than secoml movrr>. 815. 



Shafts, rapid rotation decreases the strain, 

 815. 



Shafts, rules for finding the proper di- 

 mension, 815. 



Sh ills, table of tor-ivr strengths, 814. 



Shafts, their bearings case-liardenrd, 

 902. 



Shafts, their torsion, 813. 



Shafts, the number of revolutions an ele- 

 ment of calculation, 814. 



Shafts, the power communicated, reckoned 

 in horse-power, 814. 



Shafts, the resistance to torsion is as the 

 cube of the radius, 813. 



Shaping metal, machinery for, 783. 



Sheaf of a pulley, 72'.l. 



Shearing, as a strain, 795. 



Shearing iron, 880. 



Shearing machinery, 783. 



Shearing. strain, 815. 



Shears are levers, 719. 



Sheave, the eccentric disc in steam- 

 engine fittings, 861. 



Ship in motion, the action of thr wiml on, 

 821. 



Ships, cinilion in constructing and load- 

 ing, 759. 



of a pulley, 729. 



Shrouding in water-wheels, 829. 



Shut-off valve in steam-engines, 857. 



Silk, machinery for preparing, 783. 

 ..n, human, 818. 



Skid for arresting carriages, 901. 



Sledges over ice piopelled by means of 

 kite*, 821. 



Slide, cylindrical, 856. 



