Many
apparatus figured at this exhibition, but we shall on the present
occasion merely call attention to those that presented a certain
character of novelty or of originality.
Among the apparatus that we shall reserve a description of for the
present was Messrs. Richard Bros.' registering thermometer designed
for the Concarneau laboratory, an instrument which, when sunk at one
mile from the coast, and to a depth of 40 meters, will give a diagram
of the temperature of the ocean at that depth; and Mr. Hospitalier's
continuous electrical indicators, designed for making known from a
distance such mechanical or physical phenomena as velocities, levels,
temperatures, pressures, etc.
Among the most important of the apparatus exhibited we must reckon Mr.
Cailletet's devices for liquefying gases, and those of Mr. Mascart for
determining the ohm. The results obtained by Mr. Mascart (which have
been submitted to the Committee on Unities of the Congress of
Electricians now in session at Paris), are sensibly concordant with
those obtained independently in England by Lord Rayleigh. Everything
leads to the hope, then, that a rapid and definite solution will be
given of this important question of electric unities, and that nothing
further will prevent the international development of the C.G.S.
system.
Mr. Jules Duboscq made a number of very successful projections, and we
particularly remarked the peculiar experiment made in conjunction with
Mr.
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