INSTALLATION.
American Waltham Watch Company, Waltham, Mass.

SWITCHBOARD
American Waltham Watch Company

Direct Coupled Dynamos

In large cities where space is very valuable, it has been found necessary to devise some means by which all shafting and belting can be clone away with.

With this end in view we have placed upon the market a special slow-speed multipolar dynamo which may be coupled direct to any high-speed engine.

We are also prepared to fill orders for direct coupled power generators for street railway use.
The accompanying cut illustrates our "Kodak." This consists of a too-light Mather dynamo coupled direct to a ten horse-power engine. This outfit will be found particularly well adapted for marine use; also, where factories and stores are cramped for room or desire a small plant to run independently of their large engine.

INSTALLATION.
Mechanics Fair Building, Boston, Mass.

INSTALLATION.
Shoe and Leather Exchange, Boston, Mass.

The Incandescent Lamp

The lamp used by the Mather System is the well-known PERKINS Lamp. This lamp had up to 1889 been manufactured for use only on the Mather System, and it has always been manufactured at the factory of The Mather Electric Company. The demand for this lamp by the users of other systems of electric lighting has been so large that a company has recently been formed to carry on its manufacture and sale. This company, "The Perkins Electric Lamp Company," will manufacture incandescent lamps for the general market as well as for The Mather Electric Company.

In all the essentials of a good incandescent lamp the PERKINS Lamp excels any lamp hitherto brought out. It has now been in use since 1883, and its record has been remarkable.

Inasmuch as the PERKINS Lamp is so widely known and universally approved, we will not here go into a detailed description, but: state that there is no other lamp in the market that has such "long life" and "high efficiency" combined as the PERKINS Lamp; no other is so free from the "discoloration of the bulb" usually found in lamps of other manufacturers after short use.

The efficiency of the PERKINS Lamp is so high that when combined with the Mather dynamo it produces more actual candle-power per horse-power throughout its average life than any other incandescent lamp yet produced.

THE PERKINS INCANDESCENT LAMP

INSTALLATION.
California Hotel and Theatre, San Francisco, Cal.

The Double Pole Key Socket

DOUBLE-POLE SOCKET.

The above cut shows the key-socket used by the Mather Company. It is a double-pole socket, and the only one in the market. The parts are very few in number, and the socket is so simple that it is not liable to get out of order.

It is constructed entirely of metal and porcelain, and is therefore both moisture- and fire-proof.

The double-pole feature is of special value, as it prevents the "burning out" of sockets so common in the single-pole sockets of all other systems.

continue...