Popular science monthly . ily add anadditional 20-footsec-tion of pipe if desired. The round pipe of-fers much less resist-ance to the wind thanwood timbers of equalstrength, and as it iswell insulated fromthe ground, there islittle or no loss fromthis cause. It would be well topro\ide a groundingswitch for lightningprotection on the sideof the timber near theground, connectedwith the pipe by aheavy copper wire,Init this is not abso-lutely necessary. 442 Popular Science Monthly A Convenient Arrangement forTurning on the Hall Light nearly all new buildings arewirc-d SI) that the hall li
Popular science monthly . ily add anadditional 20-footsec-tion of pipe if desired. The round pipe of-fers much less resist-ance to the wind thanwood timbers of equalstrength, and as it iswell insulated fromthe ground, there islittle or no loss fromthis cause. It would be well topro\ide a groundingswitch for lightningprotection on the sideof the timber near theground, connectedwith the pipe by aheavy copper wire,Init this is not abso-lutely necessary. 442 Popular Science Monthly A Convenient Arrangement forTurning on the Hall Light nearly all new buildings arewirc-d SI) that the hall lijiht can beturned on and off from either floor, theolder buildings do not have this con-venience. The cost of installing crossswitches is considerable, but an arrange-ment that will serve the purpose can beinstalkxi at slight expense. Get a chain socket for the lamp. Tiea cord to the chain, run it through twoeyelets as shown in the sketch, andfasten the other end of the cord to thenewel post at the head of the stairs. The. Where There Are No Cross Switches ThisMethod of Control Will Answer entire cost will be fifty cents for thechain socket. If you do not care to putscrew eyes in the woodwork, loops madefrom heavy wire can be tied to thebanister rails. Any other method ofconveying the cord to the newel postmight prove equally as satisfactory andinconsjjicuous.—E. F. Ayres. Guying the Mast IN putting up an aerial, one veryessential feature, seldom mentionedby the authors of wirelessbooks, is the necessity for a strong liraceat the top of the mast. It is a goodplan in erecting a mast, to adjust a gu\wire so that it will pull back diricth-against the strain of the aerial. Otiur-wise the top of the pole will lean inwardand perhaps break oil. Wiring the Ford Automobile forMagneto and Battery WHILE the Ford owner has beenimpressed b\ the simplicit\- andcheapness of his magneto lighting system,he has found many serious faults. If heslows down for bad roads, the voltage
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
