experiments, and discovered that he had been in error, and ultimately
became one of the most energetic supporters of the theory. This showed
how necessary it was to be careful before arriving at a conclusion on
such a subject. He had endeavored, as far as the nature of the case
allowed, to avoid any scientific abstractions, because he knew that
when practical men came to theory--_x's_ and _y's_, differentials,
integrals, and other mathematical formulæ--they were apt to be
terrified.

The President said it was like coming down to every day life to say
that it was important that gas managers should be familiar with the
appliances used in the consumption of gas, and should be able, when
called upon, to give an intelligent description of their method of
working. A study of Mr. Lane's paper would reveal many matters of
interest with regard to this wonderful motor, which was coming daily
more and more into use, not only to the advantage of gas
manufacturers, but of those who employed them.

* * * * *




M. MEIZEL'S RECIPROCATING EXHAUSTER.


At the recent Congress of the Societe Technique de l'Industrie du Gaz
en France, M. Meizel, Chief Engineer of the St. Etienne Gas Works,
described a new exhauster devised by him on the reciprocating
principle, and for which he claims certain advantages over the