carts and taken for deposit to various places, some of which are about
three miles distant. The tunnel is lined throughout with very solid
brickwork, some of which is, 18 inches thick (composed of two layers
of blue and two of red brick), and toward the river this brickwork is
increased to a thickness of six rings of bricks--three blue and three
red. A layer of Portland cement of considerable thickness also gives
increased stability to the brick lining and other portions of the
tunnel, and the whole of the flooring will be bricked. There are about
22 yards of brickwork in every yard forward. The work of excavation up
to the present time has been done by blasting (tonite being employed for
this purpose), and by the use of the pick and shovel. At every 45 ft.
on alternate sides niches of 18 in. depth are placed for the safety of
platelayers. The form of the tunnel is semicircular, the arch having a
13 ft. radius, the side walls a 25 ft. radius, and the base a 40 ft.
radius.

Fortunately not a single life has up to the present time been lost in
carrying out the exceedingly elaborate and gigantic work, and this
immunity from accident is largely owing to the care and skill which are
manifested by the heads of the various departments. The Mersey Tunnel
scheme may now be looked upon as an accomplished work, and there is
little doubt its value as a commercial medium will be speedily and fully
appreciated upon completion.

* * * * *




DAM ACROSS THE OTTAWA RIVER AND NEW CANAL AT CARILLON QUE