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Bishop, J. Leander (John Leander), 1820-1868 / A history of American manufactures from 1608 to 1860 : exhibiting the origin and growth of the principal mechanic arts and manufactures, from the earliest colonial period to the adoption of the Constitution ; and comprising annals of the industry of the United States in machinery, manufactures and useful arts, with a notice of the important inventions, tariffs, and the results of each decennial census
Volume 3 (1868)

Manufactures of Boston,   pp. 276-312 ff.

Page 289

the wards has been adopted, consisting of a double set of flues, one
carrying cold and the other warm air, so arranged that the two cur-
rents may be combined and mixed at the point of ingress, thus afford-
ing the utmost facility for controlling the temperature of the rooms
without diminishing the quantity of air required for ventilation. The
heating surface of this Hospital amounts to about eighteen thousand
superficial feet, and consists mainly of wrought-iron pipes, of one inch
internal diameter, placed in large masses, in air-chambers, through
which the fresh air passes on its way from the Fan to the registers in
the apartments.
But, while Messrs. Walworth & Co. are always prepared to under-
take large contracts of this kind, and probably employ a larger force
of workmen, experienced in putting up the appliances they construct,
than any other firm, their leading business is the manufacture of those
numerous articles included in the general term "Fittings." Among
these, there are several that are secured to them by patent; of which
probably the most valuable is a simple and excellent arrangement for
connecting the main and radiating pipes that dispenses with a number
of joints, and the consequent liability to leakage. The improvement
consists in inserting in the main pipe a branch Tee, or Manifold and
Valve, in one fitting-by which at least one third of the labor and ma-
terial in constructing the apparatus is saved ; and as the water can
pass without obstruction, it has no place to lodge or freeze. Con-
siderable economy in the use of steam is effected by the adoption of
double valves, by which all or only a part of the radiating pipes can
be used at pleasure, according to the temperature of the atmosphere
and the degree of warmth required. This Patent Manifold is the in-
vention of one of the firm-C. C. Walworth-who has also invented and
patented a " Solid Die Plate," and a machine for cutting gas fittings,
using three taps at once, now the property of the " Malleable Iron
Fittings Co." at Branford, Connecticut.
The firm of J. J. Walworth & Co. is composed of James J. Wal-
worth, Marshall S. Scudder, and C. C. Walworth, who have been
associated together since 1853, or the year subsequent to that in which
the firm of Walworth & Nason was dissolved. They have two Manu-
factories, one in connection with the store in Boston, another in Cam-
bridgeport, and also a house in Chicago.
Mr. Walworth is also largely engaged in developing some important
and novel improvements in machinery for the working of the Flax
fibre of the West. He has invested more than $100,000 capital in this
enterprise, which promises to be of great value to the agricultural in-
terests of the Western States.

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