Finally, the perforated bottom, S (which
is formed of two parts), is removed and the boiler emptied.
In order to have the operations under control, and for the purpose of
safety, there is riveted into the boiler, A, a tube, T, containing a
thermometer: and there is fixed to the tube, a, a pressure-gauge, M, and
a safety-valve. The level of the liquid is ascertained by means of a
gauge-cock, H.
* * * * *
RECENT PROGRESS OF INDUSTRIAL SCIENCE.
The thirty-fourth annual summer meeting of the Institution of Mechanical
Engineers began on Aug. 2, at Newcastle-on-Tyne. The following is an
abstract from the address of the president, Mr. E. A. Cowper.
He began by stating that as members of the Institution of Mechanical
Engineers, on revisiting their brother members and friends here in
Newcastle, after an interval of twelve years, they came as it were to
one of their natural homes; certainly to the home of one of the greatest
engineers that England has ever produced, and the birthplace of the
locomotive, which has done more than any other improvement, of our age
to lessen the cost of materials to the men who have to use them, and
therefore to cheapen and extend production in the most wonderful manner.
He then went on to say that it seems but a few years ago since George
Stephenson, at a meeting in 1847, proposed the resolution that the
Institution of Mechanical Engineers be formed.
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