ides.
Injection orifice, proper area of.
Injector, Giffard's.
Injection valve.
Inside cylinder locomotives.
Iron, strength of,
limits of elasticity of;
proper strain to be put upon iron in engines and machines;
aggravation of strain by being intermittent;
increase of strain due to deflection;
strength of pillars and tubes,
combination of malleable and cast iron.
Iron, cast, strength of,
cast iron beams;
may be strong to resist strains, but not strong to resist shocks;
should be combined with wrought iron to obtain maximum strength.
Iron, if to be case hardened, should be homogeneous.

Jacket of cylinder, advantages of.
Joints, rust, how to make.

Kingston's valves.

Lamb's scale preventer.
Lantern brass in stuffing boxes.
Lap and lead of the valve, meaning of.
Large vessels have least proportionate resistance.
Latent heat, definition of.
Latta's steam fire engine.
Lavagrian, expansion valve by.
Lead and lap of the valve, meaning of.
Lead of the valve, benefits of.
Lever,
futility of plans for deriving power from a lever.
Lifting apparatus for screw propeller.
Limits of elasticity.
Links, main description of.

Link motion of direct acting screw engine.
Link motion, how to set.
Locomotive engines,
general description of the locomotive;
Stephenson's locomotive;
Gooch's locomotive for the wide gauge;
Crampton's locomotive for the narrow gauge.
Locomotives, adhesion of wheels of,
cost and performance of;
framing of;
cylinders of;
springs of;
outside and inside cylinders;
sinuous motion of;
rocking motion of;
pitching motion of;
pistons;
piston rods;
guides;
cranked axle;
axle bearings;
eccentrics;
eccentric rod;
starting handle;
link motion;
valves, how to set;
eccentrics, how to readjust;
feed pumps;
connection of engine and tender,
driving wheels;
wheel tires.
Locomotive engine of modern construction, example of,
fire box;
barrel of boiler;
tubes;
tube plate;
framing;
axle guards;
draw bolt;
wheels and axles;
cylinders;
valve;
piston;
piston rod;
guides;
connecting rod;
eccentrics;
link motion;
regulator;
blast pipe;
safety valve;
feed pump;
tendencies of improvement in locomotives.
Locomotives, management of.
Locomotive boilers, examples of modern proportions.
Locomotive boilers, details of.
Low pressure or condensing engine, definition of.
Lubricat