: 



MECHANICS.] 



INDEX TO VOL. I. 



1239 



Arms, action of human, 818. 



Ash, data for calculating the strength of, 



Ash, table of strength of, 797, 810. 

 Astronomical instruments, machinery for 



making, 898. 

 Atmosphere, its density at different heights, 



770. 



Atmosphere, its weight fluctuates, 769. 

 Atmosphere, the, as a measure of 1 5 Ibs. 



weight, 844. 



Atmosphere, the, cools as we ascend, 771. 

 Atmosphere, the height of, 772. 

 Atmosphere, the most important of elas- 

 tic fluids, 768. 



Atmosphere, total weight of the, 771. 

 Atmospheric pressure, 768, el tq., 819. 

 Atmospheric pressure averages 15 Ibs. on 



every square inch, 769. 

 Atmospheric pressure turned to advantage 



772, et teg. 



Atmospheric railway, the, 904. 

 Atmospheric refraction, 772. 

 Attraction between water and solids, 762. 

 Attraction, cohesive, 800. 

 Automata, 783. 



Axial lines, important in drawings, 791. 

 Axis, neutral, 803, 808. 

 Axis, neutral, in the strain of a beam, 803. 

 Axle and wheel, 719, 727. 

 Axles, case-hardened, 902. 



BABBAGK'S mechanical notation, 784. 

 BalMee, hydrostatic, for ascertaining 



tic gravities, 756. 

 Balance of Quintenz, 724. 

 Balance of Roberval, 725. 

 Balance-wheels, methods for moving, 895. 

 Balances, 721, et seq. 

 Ball, motion of a billiard, 746. 

 Bands for conveying motion in machinery, 



Bands to turn wheels, 728, 886. 

 Barker's mill, 834. 

 Barker's mill applied to steam, 877. 

 Barometer determining altitudes, 771. 

 Barometer determining the height of 



mountains, 770. 

 Barometer, its origin, 769. 

 Bars, data for calculating their cohesive 



trength, 797. 



Bars, malleable iron, lection usually em- 

 ployed, 809. 

 Bri of copper, experiments on their 



strength, 797. 

 Bars of wrought iron, experiments on 



their strength, 797. 

 Battens, law of deflection in, 807. 

 Beam-engines, 874. 

 Beam-engines are generally used in 



manufactories, 880. 

 Beams, best form of section in, 805. 

 Beams, cambered, 807. 

 Beams, formula for calculating the 



strength, 805, et tey. 

 Beams loaded at one end, 809. 

 Beams loaded in the middle, and tup- 

 ported at both ends, 805. 

 Beams loaded not perpendicularly to their 



length, 807. 

 Beams loaded uniformly over their leuirth 



805. 



Beams, neutral axis of, 803. 

 Beams of the balance, 721. 

 Beam*, projecting, 809. 

 Beams, projecting, distribution of weights 



on, 803. 

 Beams, projecting, their strain examined 



803. 

 Beams, rules for computing the strength 



of, 811. 

 Beams, rules for their dimensions, 810, 



811. 



Beams, strain on, 803. 

 Beams strengthened by rods or chains, 810. 



I Beams strongest when fixed, 80C. 

 Beams supported at the ends, 811. 

 Beams, table of transverse strengths, 



810. 



Beams, T-shaped, 804. 

 Beams, their deflection under load, 807. 

 Beams, their fracture, 806. 

 Beams, what is the strength product, 811. 

 Bearing loads, animals employed for, 818. 

 Bearings for shafts, their arrangement, 



885. 



Bearings in which shafts revolve, 885. 

 Bearings used in steam-vessels for screw 



propellers, 902. 



Beauty, its elements in work, 779. 

 Beauty of machinery, on what it depends, 



782. 

 Beech, data for calculating the strenetn. 



797. 



Beech, table of transverse strength, 810. 

 Bell-crank lever for converting motion, 



894. 



Bell, diving, 774. 

 Bellows, hydrostatic, 749. 

 Bending, effects of transverse strain, 807. 

 Bending, how to prevent beams from, 



808. 



Bent-lever balance, 721. 

 Bevel gearing, 891. 

 Bevelled wheels, 728, 891. 

 Billiard-balls, motion of, 746. 

 Bird's-eye view is horizontal projection, 



785. 



Birds, how they stand and walk, 715. 

 Blow-off, a cock in marine boilers, 851. 

 Board for drawing, 794. 

 Boards of windmills, 822, 824. 

 Bodies, specific gravity of, 756. 

 Boiler, Cornish, 848. 

 Boiler, effects of internal pressure, 799. 

 Boiler, its construction, 847, et leq. 

 Boiler, marine, cleaning of a, 851. 

 Boiler, marine steam-engine, 849. 

 Boiler, rules as to dimensions, 848. 

 Boiler, tubular, 850. 

 Bologna tower, deviation of, 714. 

 Bones, motions of, 817. 

 Borda's method of weighing, 723. 

 Borelli on horses' walk, 715. 

 Boring machines, methods for moving. 



895. 



Bourdon's steam-gauge, 854. 

 Box- wood, data for calculating the 



strength, 797. 

 Boyle's law of proportion between the 



volume and pressure of air, 770. 

 Bramah hydrostatic press, 750. 

 Brandy weighs more in winter than in 



summer, 758. 



Brass and brass, table of friction, 902. 

 Brass and steel, table of friction, 902. 

 Brass, crushing pressure, 802. 

 Brass, data for calculating the strength 



797. 



Brass, table of torsive strength, 814. 

 Brass used for bearings, 902. 

 Brass used to diminish friction, 859. 

 Brasses, an apparatus in machinery, 



885. 



Breaks for machinery, &c., 901. 

 Breast-wheel, 831. 

 Breast-wheel, combined, 832. 

 Breast wheel, comparative power. 831. 

 Breast-wheel, estimated power, 832. 

 Breast-wheel, where applicable, 832. 

 Breeze, velocity and pressure of a, 820. 

 Brick building, how high one may be 



safely carried, 801. 

 Brick-making by steam, 880. 

 Bricks, effect of compressing, 801. 

 Bricks, experiments on crushing, 801. 

 Bricks, machinery for preparing, 783. 

 Brickwork columns, experiments on, 



801. 

 Bridge (tubular), 805, 809. 



Bridges formed of iron plates, 809. 



Britannia tubular bridge, 805, 809. 



Brunei's tubular bridge, 809. 



Buckets, chain of, 830. 



Buckets in water-wheels, 828, 830, 835. 



Buckets of Persian wheel, 835. 



Buckling, how to prevent beams from. 



808. 

 Building materials, experiments on 



crushing, 801. 

 Building materials, experiments upon the 



strength of, 801. 

 Building materials, influence of pressure 



on, 801. 



Bursting strain, 799. 

 Bushes, an apparatus in machinery, 884. 

 Bushes, method of making, 885. 

 Button-headed rivets in steam-boilers 

 850. 



CABLES, hempen, experiments on their 



strength, 796. 



Calculating, machinery for, 783. 

 Calico-printing machinery, 783. 

 Camber, or amount of archiu in beams. 



807. 



Camel, as a moving force, 818. 

 Cams, an apparatus to move valves, 862. 

 Cams, their action, 895. 

 Canal works, scales employed for plans 



of, 794. 



Canvas of windmills, 823. 

 Caoutchouc, machinery for preparing, 



783. 

 Caoutchouc, vulcanised, the valves o! 



condenser made of, 872. 

 Capacity of an irregular vessel, 755. 

 Capillarity, a manifestation of electric 



force, 763. 



Capillary attraction and repulsion, 762. 

 Capillary attraction, its action in oiling 



apparatus, 885. 

 Capillary attraction opposes that of 



gravity, 762. 

 Capstan, 727, 783. 

 Capstans, the friction of ropes or chains 



on, 903. 



Carding machinery, 783. 

 Carriage axles case-hardened, 902. 

 Carriages, methods of arresting, 901. 

 Carrying loads, elephant employed, 818. 

 Case-hardening, 902. 

 Cast-iron, strength of, 798. 

 Casting metals, machinery for, 783. 

 Castings of iron contract in cooling from 



a molten state, 808. 

 Catgut used for cords to drive machinery. 



887. 

 Catherine-wheel, its principle applied to 



turbines, 834. 



Caulking the rivets in steam-boilers, 850. 

 Cements, machinery for preparing, 783. 

 Centigrade scale of temperature, 907. 

 Central lines in drawings, 791. 

 Centre of gravity, 711, et tej. 

 Centrifugal force, 740. 

 Chain as a unit of measurement, 794. 

 Chain employed to strengthen beams. 



810. 

 Chain, rules for computing the strength, 



Chain-pins, the shearing strain on, 815. 

 Chains, their friction, 903. 

 Chains used to turn wheels, 728. 

 Chalk, crushing pressure of, 802. 

 Change-water apparatus in marine boilers, 



851. 

 Channels for conveying water to mills, 



Chariots propelled by means of sails, 



822. 

 Chemical action, a source of mechanical 



power, 817. 



Chemical action a source of power, 7R1. 

 Chemistry connected with mechanics, 7T3. 



