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which lamps may be turned on in the hall at the front door, and extinguished from the top of the stairs, thus allowing one to have a light before them in whatever part of the house they may choose to go. This is a matter of economy as well as convenience, for it allows of lamps being lit only when and where needed, enabling occupants to use light only in the rooms occupied, while the rest of the house remains in darkness that may be dissipated in an instant at the will of any individual occupant.
Lights outside as well as in are equally under control, and the coming or retiring guest may be lighted to the farthest point of the most extensive grounds without the necessity of the host being in any way exposed to the weather. To crown all, these luxurious conveniences are furnished at a price to place them within the reach of persons of but ordinary means. After the plant is once installed there is only the cost of the light actually used. No leaking taps, or defective joints, no smoke or smell, or dirt—
