Judge — July 8, 1922 — page 32: what you’re looking at

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

Be guided by the experience of thousands of travelers the world over and use MOTHERSILL’S SEASICK REMEDY It prevents and relieves nausea Offccially adopted by Steamship Companies on both fresh and salt water. Contains no cocaine, mor- phine, opium, chloral, coal tar pro- ducts or their derivatives,nor other habit forming drugs. Sold by leading druggists — 60c and $1.200n guarantee of satisfac- tion or money ref MOTHERSILL REMEDY CoO. ROIT micmaae for every owner of a DODGE BROTHERS MOTOR CAR IOW do you know what sccemory equipment will best serve your porpine ia adding to your comfort and eajoyment ia Thi bonk gives the selections of experts, made stady. test and conference with the Bureau of Standards, Washingtoo; Underwriter's Laboratories, amd other institutions of scientific Ita conclusions are based on experienced knowladee. It tells the exact equipment in each instance. which after thorough test, these experts believe Till cive you the, bent renulta, Ut leo, carrie = It dower formation. "Your copy ef Unia book will be sent postpaid on receipt of cvia oF stamon, of Toe 25¢ WILLIAM GREEN, Inc. 627 West 43d St. New York City "and RECORD. ‘OF ‘it ‘ENTION or sketch and description of BLANK." Send model iaveton iat our fee opis oft ni eae Prompt Service. vievon's 4 “EVANS & CO., 813 Ninth, Washington, a Cc GEoRGs SOME Hone, Radio Department Conpuctep By WiLLiam H. Easton, Ph.D. Subscribers to Jvpax are invited to turn to us for advice ~ ia made for this service, As name and czact strect address, In cave an anseer by mail ig For information concerning the technical details of construction of receivers and trans- No char in of radio receiving sets. 43d Street, New York postage stamp should be jing the selection. berg ro ion and care ress all letters to Radio Editor, Ivoce, 687 West a teo-cent mittere the reader is eerved to the several very excellent technical radio journals which are to be found everywhere to-day Loud Speakers HE “loud speaker” is an instru- ment which is connected to the radio receiver in place of the ear- phones and so magnifies the messages that they can be heard all over the room. It permits radio concerts to be heard by a number of people without the use of earphones and makes possible the latest kind of entertainment—radio dances. Loud speakers cannot, however, be used with every radio receiver. In order to give satisfactory service, the messages they receive must be very powerful to begin with. A good rule is that unless the sounds as heard in the earphones are intolerably loud they cannot be satis- factorily reproduced by a loud speaker. This requirement prevents the use of these instruments with almost all crystal detector and single-tube receivers, and makes necessary at least one stage, and usually two stages, of amplification. It also prevents the reception of distant or weak-voiced stations except with the earphones. BEN if the loud speaker can produce a sufficient volume of sound, the quality of its performance is usually very inferior to that of the earphones. Its music is apt to be raucous, and it is rarely able to transmit spoken words intelli- gibly for distances of more than a few feet. This unsatisfactory delivery is due to the fact that the incidental noises in- troduced by the high initial amplification are greatly exaggerated by the loud speaker, while some additional noises are contributed by the instrument itself. Hence both the receiver and the loud : aker must be well designed, or else a seals will be anything but pleasing. The radio enthusiast will, therefore, always prefer the earphones for his per- sonal work with his receiver; but he will find a loud speaker useful on many oc- casions. TH cheapest kind of a loud speaker is made by mounting one’s own phones in place of the reproducer of one’s own phonograph, thus using the sound box of the phonograph to obtain the necessary magnification. A clip for at- taching a single phone in this manner can be purchased for sixty cents; and devices holding two phones and supplied with rubber cushions to eliminate vibra- tion can be obtained at prices up to 85. If, however, one doesn’t own a phono+ 30 graph or does not care to employ it for this purpose, a large variety of horns, for use in a similar way with either one or two of one’s own phones, is available. Prices of these horns (without phones) range from $5 to $15. Such arrangements are at the best makeshifts, however, and better results can be obtained with either phonograph attachments or horns with specially de- signed, highly sensitive phones. Loud speakers of this kind cost from $15 to $40 including the phone. THE loud speakers so far described are suitable for use in ordinary living rooms but do not produce sufficient volume for halls or churches. For reach- ing large audiences, loud speakers with special electrical magnifying devices are needed. Some of these instruments have tremendous power. By means of them, dances to music from Newark, N. J., have been held in the streets of towns in Cuba and Wisconsin. Their cost ranges from $90 to $168. The radio receiver of the future will, however, have its loud speaker built into it, just like a modern phon In- struments of this kind are already avail- able; and while most of these are of high- grade construction and cost more than $300, certain makes can be obtained for less than $100. What Stations Can You Hear? IX ORDER to give radio beginners an idea of the possibilities of their re- ceivers, ers in various parts of the country are invited to send this Depart- ment a list of the principal broadcasting stations heard by them regularly and Sealy on one stage of amplification or ess. Portland, Ore—KGG, KGN, KGW, KYG: KQY, all of Portland.—L. S. Laid- We Bear Creek, Mont—Denver, Col.; Stockton, Cal.; Los Angeles, San Fran- cisco; Chicago.—W. E. Slawson. New York City—WJZ, Newark; WWZ, New York; WHN, Ridgewood, LL; 2XB, Deal Beach; KDKA, Pittsburgh; NOF, Washington, D.C.; WGY, Sche- nectady; WBZ, Springfield, Mass.—L. R. Jones. Williamsport, Pa.—KDKA, Pitts- burgh; WJZ, Newark; WGY, Schenec- tady; NOF, Washington; stations in Harrisburg, Philadelphia and Reading.— S. A. Jenkins.