removed and a chimney pipe put in its place, so as to give a draught for
kindling the fuel in the producer. When the fuel is kindled the chimney
is removed and the cap substituted, whereupon the suction of the engine
continues the draught as required.

* * * * *




THE BAZIN SYSTEM OF DREDGING.

By MR. A.A. LANGLEY.


This paper, lately read before the Institution of Mechanical Engineers,
London, is a description of the construction and working of a dredger
on M. Bazin's system, as used by the author for the past three years in
dredging sand and other material in Lowestoft Harbor. The dredger is
represented in its general features on next page, Fig. 1. The total
length of the hull is 60 ft., with 20 ft. beam. In the after part of the
hold is placed a horizontal boiler, A, which supplies steam to a pair
of inverted vertical engines, B. These engines drive, through belts and
overhead pulleys, a centrifugal pump, C, which discharges into the open
trough, H. The suction pipe, D, of this pump passes through the side of
the dredger, and then forms an elbow bent downward at an angle of 45
deg. To this elbow is attached a flexible pipe, E, 12 in. in diameter
and 25 ft. long, made of India-rubber, with a coil of iron inside
to help it to keep its shape. At the lower end of this pipe is an
elbow-shaped copper nozzle which rests on the bottom, and is fitted with