Indianapolis Times, Indianapolis, Marion County, 21 November 1948 — Page 34

Future Home

THE INDIANAPOLIS TIMES

PAGE 34

Will Hear 4 Types of Radio

There'll Be AM, FM, TV and Facsimile

The well-equipped radie home of the future will have at least four different types of receivers, one each for AM, FM, TV, and facsimile broadcasting systems. It may also have a receiver for color television, and perhaps one for Telefax, a new communication system that involves television, radio relays, facsimile and photography. AM, which stands for Amplitude Modulation, is the long-used familiar type of radio

transmission. FM, or Frequency Modulation, rapidly coming into wide use, is a newer type of transmission, | which some day may replace! much of the AM system. TV stands for television, now| available to nearly half the peo-| ple of the United States in black-/| and-white pictures of events as they occur. Few in Use { Color television, which will re-| quire a different receiver, will be| perfected in the next few years. Facsimile is a system which prints on the home receiver a| printed page with illustrations on| photographically sensitive paper,

systems are all in use, and more or less well established. Telefax| {s still in an experimental stage.

Its first use will probably be in| Mathematics Teachers, Inc. that same bit of soil might well be New Jersey, Maine and Quebec.

commercial communications, per-| haps replacing telegraphy in part. { It is said to send copy at a rate] of a million words a minute. It| sends prepared copy by television, and relay stations to receivers where an exact reproduction appears on the receiver scope, or) viewing screen. The images, following each other In very rapid succession, are| recorded photographically by a| motion picture camera.

AM and FM are competing make both a qualitative as well; .ic of Pleistocene times which |

transmission systems for the or-| dinary program. Both have ad-| vantages and disadvantages. AM| is often referred to as long-range because of the distant stations) that can be picked up. FM is relatively short-range in| ‘comparison, But FM is staticfree and reproduces with more exactness, or higher fidelity. It is a wide-range system in the sense that it transmits tones of higher and lower pitch than are sent by AM. -AM is long-range in the sense that its relatively low-frequency radio waves in passing through space wil follow somewhat the curvature of the earth. FM utilizes high-frequency radio waves, and these travel prin.eipally in straight lines. Due to

to continue scientific search (right

- = = » su ” s |mained. | { Dr. Potzger, Butler Botanis rl “Well. drillers and excavators Fomach ou 2 en of the Jow| 2 ? Considered Expert In Field

Study of Buried Forest Composition

Gives Key to Geological Phenomena

To most of us, a spadeful of freshly turned earth is just some- js ynendin uest for scientifi The first four of these radio|thing to be removed to make way for a lettuce patch, a gold mine|qata has hg: So inte widely |, Hunger, according to Dr. Scott,

or an oil well.

But to Prof. John E. Potzger of Butler University's Department nas made explorations T of Botany and president of the Central Association of Science and| Minnesota, my enas, He said that desires for food

the beginning of a new and ex-| citing investigation into the phan-| tom forests of the past. Dr. Potzger is one of the pioneers of research in ‘pollen analy-! sis in North America. Fifteen years ago there were perhaps] only five or six such analysts in this country. Now, however, the

number is much greater because

of his pioneering. | Pollen analysis made its debut in North America about 25 years| ago. It enables botanists to| as quantities interpretation of] forest composition of the past! and the changes which have taken place. To Preside at Parley Dr. Potzger will preside at the 48th annual convention of the! Central Association Nov. 26-27 in the Claypool Hotel. Dr. Potzger is a paleo-botanist. In this field of botany, the scientist reconstructs the earth's past from the fragmentary, tell-tale records left in rocks or in the sediments of lakes and ocean basins. A tooth, a track, a whole skeleton, perhaps a mass of carbonized plant remains, serve as evidence of the life of past ages. In more recent times, the pollen dust of “phantom forests” of the past, which is found in the muds

the curvature of the earth, they are too high up in the air to be received by ground-based radios at distant points. It was thought at first that they could not be received heyond some 50 miles from the transmitter, but excellent reception has . been obtained at far greater distances. Static Chief Nuisance

The greatest nuisance in ordinary radio reception {is static. With frequency modulation, static offers very little trouble. It takes a technician to understand all about amplitude modulation and frequency modulation, but even a layman can get some idea from the words themselves Amplitude refers to the size of a wave, frequency to its rate of formation and therefore to the length of the waves. In simplest words, it might be said that the frequency of AM waves remains constant while their amplitude changes, and in FM the waves remain constant

'A Native Product

Pilgrims’ Wine

By Science Service In the account of the first Thanksgiving feast that has come down to us, mention is made of wine—for the Pilgrim Fathers were not “puritanical” in that respect at least. This, like the corn and pumpkins and cranberries they shared with their friendly Indian guests, was a native American product, for the wild grapes found in New England are a pretty good fruit “as is.” This wild grape species, sometimes called, the fox grape, has become the brineipal ancestor of the Concord and other table grapes raised in the East. Some especially choice varieties have been originated by hybridizing it with muscadine, scuppernong and other American grapes from farther south, as well as

in size, or amplitude, while their frequency changes.

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History Is Found Recorded in Isle Royale Soil

In the heart of Isle Royale group in Lake Superior, Dr. John F. Potzger takes a sample of peat on the Raspberry Island bog (left). With an aid, W. Lauterbach, Dr. Potzger indicates, a likely spot

[Report Hunger, Appetite Differ

By Science Service A year of only 180 days is the prospect that will face people on the earth a few billion years U. 8. Naval Observatory, rom now, mates, By that time friction, which

‘otate a tiny bit slower than the] Over Causes . |year before, will probably give NEW YORK, Nov. 20 (UP)—|man a second, minute, hour and After all the years, sci is faced with the mystery of why a hungry man feels that way. According to Dr. Edward M. Scott, of the University of Pittsburgh, hunger can be defined as: “The physiological and psychological state produced by inadequate food.” Its symptoms, Dr. Scott has reported to the Pittsburgh section of the American Chemical Society, can be described as: -“A rather indefinite state of physical restlessness accompanied by a more or less vaguely unpleasant subjective feeling.” Symptoms Are Mystery But the mystery of how the symptoms are produced still re-| mains, he points out. { Dr. Scott believes that the! {exact cause of the hunger state ). (is probably unknown.”

|day until not a single tree re-| it has-been proposed as re-| sulting from emptiness of the|

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of today meet remnants of these of those explanations is entirely | slaughtered forests’ buried deep|satisfactory,” he sald. {in glacial till. Thus vegetation {had to begin from ‘scratch’ on| {the new soils.” |

Relief of Hunger State Wd know only that the hunger| | Dr. Potager has Pot confined state is relieved when a food or!

{combination of foods which gives (his activities to Hooslerland.|,4equate satisfaction is given.”

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Water Repellent Ticking ppears not to lead directly to Mail Orders Promptly Filled? scattered geographical areas. He g,nnrecq fits distressing i by i" Si BE {and for specific foods are appeotme————— tites, which h of lakes and bogs, tells the story. | Although a native of the Wol-|uppohaniy the elvan

|verine State, Dr. Potzger finds This is called a pollen profile. Indiana “most interesting.” Here jog profess, hey oy indirectly

Pollen profiles also record great he has found not only the deep-| : climatic changes as well as the lest bogs, but remnants of plants Stress Nutrition Needs coming of mighty vegetations. In| Which had once existed in Wis-| Personal tastes to satisfy the] many instances, Dr. Potzger has|consin, {appetite is not the road to health, | found, these were later completely| Last year the head of the de- the doctor said. Rather, he said, replaced by a different forest|partment of plant geography at|the diet should be based on nu-| e. [the University of Montreal in-|tritional needs. Investigations of Dr. Potzger|vited him to come to Quebec to| “Our conclusion,” he said, “is and fellow researchers center in|conduct a bog study in order to|that while in certain cases, rethe forest movements following get accurate data on the history | liance on appetites may be lead to the gradual wasting of the ice/of vegetation of that province. (adequate nutrition there is ample Dr. Potzger is now in the evidence that such reliance will had pushed southward as far as|process of completing a book on|not guarantee good nutrition. the Ohio valley. | his findings in the St. Lawrence! ‘The short-cut té good nutri“Glaciers,” observes Dr. Potz-{lowland and as far northward tion is the prescription of diet on ger, “veneered the landscape into the Canadian Shield as Lake the basis of known nutritional with néw soils, which in many|St. John. {needs, and this path should be localities reach a depth of 200 When completed, he said, the followed rather than trusting to to 400 feet. They rode merciless- Work will be published in a|devious likes and dislikes of the ly over the vegetation of that'Canadian journal, lindividual.” :

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SUNDAY, NOV. 21, 1948"

esti-

Predict 180-Day Year Due in Distant Future

G. M. Clemence, director of the/tween planting and harvest im National! Almanac office of the which to work.

The length of the seconds pendulum will have to be increased

. . It will be possible to do twice from Experts Still Uncertain |each year causes the earth tol oueh work in a5 eight-hour Mr. Clemence reported to the

39 inches to about 55 inches,

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