See _Orders in Council_
Hoxie. See _Stewart_,
Hubou, acetylene black,
Hungarian rules for apparatus,
Hydraulic pendants for acetylene,
Hydrocarbons formed by polymerisation,
illuminating power of,
volatile, names of,
Hydrochloric acid in purified acetylene,
Hydrogen and acetylene, reactions between,
effect of, on acetylene flame,
ignition temperature of,
in acetylene,
liberated by heat from acetylene,
silicide in crude acetylene,
Hygienic advantages of acetylene,
I
Ice, reaction between carbide and,
Ignition temperature of acetylene,
various gases,
Illuminating power and illuminating effect,
definition of,
of acetylene, after storage,
carburetted,
effect of air on,
incandescent,
nominal,
self-luminous,
of acetylene-oil-gas,
of air-gas,
of polymerised acetylene,
of candles,
of coal-gas,
of electric lamps,
of hydrocarbons, various,
of paraffin,
Illumination, amount of, required in rooms,
of lighthouses,
of optical lanterns,
Impurities in acetylene, carbide,
detection and estimation of,
effect of, on air,
generator,
harmfullness of,
water soluble,
See also _Ammonia_ and _Sulphuretted hydrogen_
in coal-gas,
in purified acetylene,
maximum limits of,
Incandescent acetylene,
burners.
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