installations.

The electric machines are 2 meters in height. The diameter of the rings is
about 45 cm. and their length is 70 cm. The electric tension of the
dynamos measures 600 volts.

[Illustration: FIG. 2.--TURNOUT TRACK OF THE ELECTRIC RAILWAY, FRANKFORT,
GERMANY.]

The duty varies between 80 and 50 per cent., according to the arrangement
of the cars. The total length of the road is 6,655 meters. Usually, there
are four cars _en route_, and two dynamos serve to create the current.
When the cars are coupled in pairs, three dynamos are used--one of the
machines being always held in reserve. All the dynamos are grouped for
quantity.

[Illustration: FIG. 3.--GENERAL PLAN OF THE ELECTRIC WORKS.]

The company at present owns six closed and five open cars. In the former
there is room for twenty-two persons. The weight of these cars varies
between 3,500 and 4,000 kilos.--_La Lumiere Electrique._

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By the addition of ten parts of collodion to fifteen of creasote (says the
_Revue de Therap._) a sort of jelly is obtained which is more convenient
to apply to decayed teeth than is creasote in its liquid form.

* * * * *