3 francs per day, or about 2,500 francs for a
year of 300 days' work.
The gas motor, therefore, effects a great saving, while at the same time
occupying less space, consuming less water and operating just as well.
With Mr. Witz we cheerfully admit all the advantages that he so clearly
establishes with his perfect competency in such matters, but there still
remain two points upon which we wish to be enlightened. Are not the
starting up, the operation and the keeping in repair of a gas generator
actually more complicated and more delicate than the same elements of a
steam engine? Does not the poor gas manufactured in a gas generator
present, from a hygienic point of view, danger sufficiently great to
proscribe the use of such apparatus in many circumstances?
Such are the points upon which we should like to be enlightened before
unreservedly sharing Mr. Witz's enthusiasm, which, however, is
justified, economically speaking, by the magnificent results of the
experiments made by the learned engineer.--_La Nature_.
[Illustration: FIG. 3.--GAS MOTOR OF 100 INDICATED HORSE POWER.]
* * * * *
IMPROVED PNEUMATIC HAMMER.
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