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These include hotels, taverns, restaurants,
eating houses, dining and coffee rooms,
bakehouses and confectioners, vegetarian
restaurants, but not the places in which the
food is cooked by means of gas stoves, such
as the shops of the Aerated Bread Company
and businesses of a similar character, for the
reason that no black smoke is given off with
this method of heating.
The substitution of gas stoves for the
present clumsy way of firing with soft
bituminous coal would, under proper regulations
as to ventilation, etc., render the escape
of black smoke into the atmosphere impossible,
and ensure greater cleanliness and economy.
Appliances now in the market are provided
with "Bunsen" burners, by which a quantity
of air is burnt mixed with the ordinary
carburetted hydrogen gas, and the oxygen
thus derived from the atmosphere produces
increased heat and more perfect combustion.
The employment of asbestos for creating
a larger surface of radiation in connection