Judge — July 15, 1922 — page 33: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

| j ] ] | ] | Underwood read off. If the reading is 1,300, the battery is fully charged; if it is 1,225, the is about half discharged; while is 1,150, the battery is exhausted. (These figures indicate the specific grant- ing of the electrolyte.) The detern tions are ea: and quickly made and are exceedingly accurate. The hydrometer costs about seventy-five cents and can be purchased from any automobile or radio supply house. Instructions for its use come with the instrument. A frequent fault is to purchase too small a battery for the use to whic s to be put. Batteries are rated according to their ampere-hour capacity and range from forty to 175 ampere-hours for radio work. It is evident that a forty-ampere- hour battery is too small to operate a receiver with three tubes for three hours every night for a week without recharging since, as we have seen, sixty-three am- pere-hours are needed for such service. Such a battery should be charged every three days or else a large battery should be purchased. A 100-ampere-hour bat- tery is about right for ordinary radio purposes, ERE are some important rules for the care of a storage battery: Never let the battery be fully dis- charged, or it will be damaged. Never let it stand idle for several months at a time. On going away for a long period send the battery to a local service station where it will be properly stored. Keep the plates (which can be seen when the caps giving access to the cell are removed) covered by adding pure dis- tilled water when the electrolyte gets too low. Do not use ordinary water for this purpose as it contains impurities that will injure the batter, Wipe off the top of the battery occa- sionally with a rag soaked in heavy oil or soft vaseline. This will prevent leakage of current due to moistur B r let a metal object touch the terminals of the battery as a disastrous short circuit may result. Ohm, Sweet Ohm, Watt? THE proper place for a storage battery is in the cellar, with wires running up through the floor to the receiver. If, however, the battery must be kept in a living-room, ¥ it in a large box. The acid electrolyte is sure to spatter, and if F rugs, wall paper, or furniture, it will ruin them. Also always place the battery on a box when it is located in the cellar, and never touch it (or any other electrical device) unless standing on a box or a dry board. The reason for this precaution is that one is in contact with the ground when stand- ing on the cellar floor, and since electricity usually endeavors to reach the ground severe shock may be experienced on touching a live electrical part unless there is an insulator between the feet and the floor. Answers to Inquiries Benton, M1ss.—The dry cell tube you refer It can be purchased from 27 Boylston Boston. It ve Purpos —You will need at least two stages audible results from a ra set tung @ Phonograph as a loud speaker, and you would find this very complex and difficult to' make. “1 would : tube outfit and using on a 1» but ms to be heard there with a good ¢ Westinghouse type R. Forest su st R. 6, or Clapp-Eastham R. 7%. These instr . from $150 to 9020 and can be secured from the Butte #2 being made up fort, bowev e volume for that purpose, ‘This additions! should. be obtainable in the near future, ‘The best aerial for this instrument is a single wire from 100 to 150 feet long, as Your four 32-feet wires are not much high as possibl With a better than a single wire of the same length. long aerial you should hear C Pittsburgh under atmospheric. condit COR. R The reason the second stage not as clear as the ded by each Your second stage speaker or an indoor ae uu should be able to hi N. ¥—It is hardly possible to anim tubs receiver complete for less than $50 for the simple reason that the ne cessories—aerial, battery, storage battei id earphones—cost about $40, With a good ‘erystal u should be able to hear a number of code and might often pick up WGY at . Menuni, 1 single-wire aerial, long and fifty feet high, is satisfactory, but you will hear nothing except a few code messages with w crystal de- tector. 3L New Invention Relieves Hay Fever Catarrh, Asthma Not a Patent Medicine Don't let Hay Fever, Ri ‘Summer Colds ruin your’ O°Tol, a new invention ible and most beneficial treatment. Cost If it Fails has worked wonders for sufferers Hundreds have found ure and.quick that an ‘Try Breathe-OSTol. without va catia i ak ‘at work, aa riya Beal simply specify set THE BREATHE-O-TOL LABORATORIES Dept. C-137 1400 Broadway, New York City BF. 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