developed by Sir William Thomson. The atmospheric electricity is
gathered up by means of a thin thread of water, which flows from a
large brass reservoir furnished with a metallic tube 6.5 feet long. The
reservoir is placed upon glass supports isolated by sulphuric acid, and
is connected to the electrometer by a thread of metal which enters a
glass vessel containing sulphuric acid; into the same vessel enters a
platinum wire coming from the aluminum needle. Only 3,000 observations
were given by the photographic register, due to the fact that the
instruments were not fully protected against constant wet and cold.

Besides these observations direct observations of the magnetometer were
made, and the absolute determination of the elements of terrestrial
magnetism attempted.

On the 17th of November, 1882, a severe magnetic disturbance occurred,
lasting from 12 M. until 3 P.M., which in three hours changed the
declination 42'. The same perturbation was felt in Europe, and the
comparison of the observations in the two hemispheres will prove
instructive.

* * * * *




THE ELECTRIC RAILWAY AT VIENNA.


The total length of this railway, which extended from the Eiskeller in
the Schwimmschul-Allee to the northern entrance of the Rotunda, was