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Excerpt: ...tube in this case is used as a generator of oscillations. CHAPTER XIV HEADPHONES AND LOUD SPEAKERS Wireless Headphones.-A telephone receiver for a wireless receiving set is made exactly on the same principle as an ordinary Bell telephone receiver. The only difference between them is that the former is made flat and compact so that a pair of them can be fastened together with a band and worn on the head (when it is called a headset), while the latter is long and cylindrical so that it can be held to the ear. A further difference between them is that the wireless headphone is made as sensitive as possible so that it will respond to very feeble currents, while the ordinary telephone receiver is far from being sensitive and will respond only to comparatively large currents. How a Bell Telephone Receiver Is Made.-An ordinary telephone receiver consists of three chief parts and these are: (1) a hard-rubber, or composition, shell and cap, (2) a permanent steel bar magnet on one end of which is wound a coil of fine insulated copper wire, and (3) a soft iron disk, or diaphragm, all of which are shown in the cross-section in Fig. 62. The bar magnet is securely fixed inside of the handle so that the outside end comes to within about 1/32 of an inch of the diaphragm when this is laid on top of the shell and the cap is screwed on. Illustration: Fig. 62.-Cross-section of Bell telephone Receiver. Illustration: original © Underwood and Underwood. Alexander Graham Bell, Inventor of the Telephone, now an ardent Radio Enthusiast. The ends of the coil of wire are connected with two binding posts which are in the end of the shell, but are shown in the picture at the sides for the sake of clearness. This coil usually has a resistance of about 75 ohms and the meaning of the ohmic resistance of a receiver and its bearing on the sensitiveness of it will be explained a little farther along. After the disk, or diaphragm, which is generally made of thin, soft sheet iron...

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 Excerpt: ...of the same wood. The surface is of equal thickness from end to end." Among the South American Indians the sumpitan is represented by the long delicate "pucuna," or the heavy and unwieldy "zarabatana." All savages use poisoned arrows in their blow-guns instead of harmless pellets of clay or putty. Taking a few hints from the primitive warriors and hunters of Borneo and South America, any boy, with a little care and small expense, can construct for himself a blow-gun which will be handy to carry around and will shoot with great accuracy. Mr. W. Hamilton Gibson, the well-known artist, has acquired such skill with the blowgun that he seldom misses the mark, and often brings home birds and other creatures brought down by a clay pellet blown from a glass sumpitan. For twenty-five cents a glass tube, three or four feet long, can be purchased. With these tubes can be made the best of blowguns, but they are objectionable on account of being liable to break at any moment from some accidental blow or jar. With some flannel or woollen cloth and an old piece of cane fishing-pole a cover and a case can be made to enclose the glass and prevent its being broken by anything short of a severe knock or fall. To Make a Blow-Gun. Select a good straight piece of glass tube about three or four feet long. To discover whether the glass tube is straight or not, hold it horizontally level with the eye and look through it, and any deviation will be quickly seen. Wrap the tube with strips of flannel or woollen cloth, as illustrated by Fig. 131, A. The A. rii fo--D cJfe Fig. 131.--The Hunter's Blow-Gun. cloth will make a soft covering or cushion for the outside of the glass and render it less liable to break. With a red-hot iron rod, or some similar instrument,...

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 Excerpt: ...the setting sun,--his steps supported by two superincum So remarkable a sight, of course, impressed the four children very deeply; and they returned immediately to their boat with a strong sense of undeveloped asthma and a great appetite. Shortly after this, the travellers were obliged to sail directly below some high overhanging rocks, from the top of one of which a particularly odious little boy, dressed in rose-coloured knickerbockers, and with a pewter plate upon his head, threw an enormous pumpkin at the boat, by which it was instantly upset. But this upsetting was of no consequence, because all the partly knew how to swim very well: and, in fact, they preferred swimming about till after the moon rose; when, the water growing chilly, they sponge-taneously entered the boat. Meanwhile the Quangle-Wangle threw back the pumpkin with immense force, so that it hit the rocks, where the malicious little boy in rose-coloured knickerbockers was sitting; when, being quite full of lucifer-matches, the pumpkin exploded surreptitiously into a thousand bits; whereon the rocks instantly took fire, and the odious little boy became unpleasantly hotter and hotter and hotter, till his knickerbockers were turned quite green, and his nose was burnt off. Two or three days after this had happened, they came to another place, where they found nothing at all except some wide and deep pits full of mulberry-jam. This is the property of the tiny, yellow-nosed Apes who abound in these districts, and who store up the mulberry-jam for their food in winter, when they mix it with pellucid pale periwinkle-soup, and serve it out in wedgewood china-bowls, which grow freely all over that part of the country. Only one of the yellow-nosed Apes was on the spot, and he was fast asleep; yet the...

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1871 edition. Excerpt: ... person, is innocent, because it is just; j and he needs not thy mercy and remission. 9. Let no man, for his own poverty, become more op!pressing and cruel in his barlgain, but quietly, modestly, diligently, and patiently reIcommend his estate to God, and follow its interest, and leave the success to Him: for such courses will more probably advance his trade; they will certainly procure him a blessing and a recompence; and, if they cure not his poverty, they will take away the evil of it: and there is nothing else in it that can trouble him. 10. Detain not the wages of the hireling; for every degree of detention of it beyond the time is injustice and uncharitableness, and grinds j his face, till tears and blood come out: but pay him exactly according to covenant, or according to his needs. 11. Religiously keep all promises and covenants, though made to your disadvantage, though afterwards you perceive you might have been better: and let not any precedent act of yours be altered by any after-accident. Let nothing make you break your promise, unless it be unlawful, or impossible: that is, either out of your natural, or out of your civil power, yourself being under the power of another; or that it be intolerably inconvenient to yourself, and of no advantage to another; or that you have leave expressed, or reasonably presumed. 12. Let no man take wages or fees for a work that Ire cannot do, or cannot with probability undertake, or in some sense profitably, and with ease, or with advantage manage. Physicians must not meddle with desperate diseases, and known to be incurable, without declaring their sense beforehand; that if the patient please, he may entertain him at adventure, or to do him some little ease. Advocates must deal plainly with...

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ... for the most part; and she was filled with gratification to discover that she, on the contrary, was making a good many shrewd speeches and now and then a really brilliant one, and furthermore, that they were beginning to be repeated in social circles about the town. Congress began its sittings, and every day or two Washington escorted her to the galleries set apart for lady members of the households of Senators and Representatives. Here was a larger field and a wider competition, but still she saw that many eyes were uplifted toward her face, and that first one of guests.-The drawing-rooms were brilliant with gaslight, and as hot as ovens. The host and hostess stood just within the door of entrance; Laura was presented, and then she passed on into the maelstrom of be-jeweled and richly attired low-necked ladies and white-kid-gloved and steel-pen-coated gentlemen;and wherever she moved she was followed by a buzz of admiration that was grateful to all her senses--so grateful, indeed, that her white face was tinged and its beauty heightened by a perceptible suffusion of color. She caught such remarks as, "Who is she?" "Superb woman!" "That is the new beauty from the west," etc., etc. person and then another called a neighbor's attention to her; she was not too dull to perceive that the speeches of some of the younger statesmen were delivered about as much and perhaps more at her than to the presiding officer; and she was not sorry to see that the dapper young Senator from Iowa came at once and stood in the open space before the President's desk to exhibit his feet as soon as she entered the gallery, whereas she had early learned from common report that his usual custom was to prop them on his desk and enjoy them...

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1869 Excerpt: ...life unto life," and foretelling the growth of "evil men and seducers " after his departure.2 12. Observe the agreement of sentiment in the following texts: St. James, taught by his Lord and Master, says, " Be ye doers of the word, and not hearers only, deceiving your own selves." St. Paul nearly in the same words, "Not the hearers of the law are just before God, but the doers of the law shall be justified."3 Again, did we not know whence the following passages come, should we not assign them to St. James?" God will render to every man according to his deeds; to them, who by patient continuance in well-doing, seek for glory, and honour, and immortality, eternal life; but unto them that are contentious, and do not obey the truth, but obey unrighteousness, indignation, and wrath.... for there is no respect of persons with God." This, as well as the text just cited, is to be found in the opening of that Epistle, in which St. Paul appears most to differ from St. James; now observe how he closes it. "Why dost thou judge thy brother? And why dost thou set at nought thy brother? For we shall all stand before the judgment-seat of Christ.... Every one of us shall give account of himself to God." Again, in 1 John xviii. 37. 2 1 Tim. vi. 13. 2 Cor. ii. 16. 2 Tim. iii. 13. 3 James i. 22. Rom. ii. 13. another Epistle: "We must all be made manifest before the judgment-seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad. Knowing therefore the terror of the Lord, we persuade men."1 13. St. John, after our Lord's example, implies especial praise upon those who follow an unmarried life, involving the letter in the spirit, as is freque...

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...20. I rose at five, and after breakfast washed the dishes, and then helped Mother work. Anna is in Boston with Cousin Louisa. I took care of Abby in the afternoon, and in the evening I made some pretty things for my dolly. Nov. 5. Did my lessons, and in the evening Mother read "Kenilworth" to us while we sewed. It is splendid! We have had a lovely day. All the trees were covered with ice and it shone like diamonds or fairy palaces.--From the Diary of Louisa M. Alcott. Copyright. 1889. by John S. P. Alcott. People often keep a record of the events of each day. This record is called a diary. Keep a diary for a week. Put down every day the events that interest you, or that you would like to remember. Complete the following sentences: 1. There is a period after Sept., because. 2. There is an apostrophe in it's, because. 3. Mother s is written with an apostrophe and s, because. 4. Anna begins with a capital letter, because. 5. Cousin begins with a capital letter, because. LESSON 146 LONGFELLOW'S DIARY Henry Wadsworth Longfellow put into his diary bits of beautiful description. The following was written June 23, 1831: I can almost fancy myself in Spain, the morning is so soft and beautiful. The tessellated shadow of the honeysuckle lies motionless upon my study floor, as if it were a figure in the carpet; and through the open window comes the fragrance of the wild brier and the mock orange. The birds are caroling in the trees, and their shadows flit across the window as they dart to and fro in the sunshine, while the murmur of the bee, the cooing of the doves from the eaves, and the whirring of a little humming bird that has its nest in the honeysuckle, send up a sound of joy to meet the rising sun. Find, in the dictionary, the meaning of the word tesse...

Excerpt: ...A part of the Morescoes hurry him off. Alhadra. The Tyger, that with unquench'd cruelty, 100 Still thirsts for blood, leaps on the hunter's spear With prodigal courage. 'Tis not so with man. Maurice. It is not so, remember that, my friends! Cowards are cruel, and the cruel cowards. Alhadra. Scatter yourselves, take each a separate way, 105 And move in silence to the house of Velez. Exeunt. Scene.

Excerpt: ...up than I usually do. During the first hymn I happened to strike Piggy against the side of the seat. Such an ear-splitting squeal as he set up. It sounded as if I was murdering him. The people stared and stared, and I had to leave the church, overwhelmed with confusion." Mrs. Wood and Miss Laura laughed, and then they got talking about other matters that were not interesting to me, so I did not listen. But I kept close to Miss Laura, for I was afraid that green thing might hurt her. I wondered very much what its name was. I don't think I should have feared it so much if I had known what it was. "There's something the matter with Joe," said Miss Laura, when we got into the lane. "What is it, dear old fellow?" She put down her little hand, and I licked it, and wished so much that I could speak. Sometimes I wish very much that I had the gift of speech, and then at other times I see how little it would profit me, and how many foolish things I should often say. And I don't believe human beings would love animals as well, if they could speak. When we reached the house, we got a joyful surprise. There was a trunk standing on the veranda, and as soon as Mrs. Wood saw it, she gave a little shriek: "My dear boy!" Mr. Harry was there, sure enough, and stepped out through the open door. He took his mother in his arms and kissed her, then he shook hands with Miss Laura and Mr. Maxwell, who seemed to be an old friend of his. They all sat down on the veranda and talked, and I lay at Miss Laura's feet and looked at Mr. Harry. He was such a handsome young man, and had such a noble face. He was older and graver looking than when I saw him last, and he had a light, brown moustache that he did not have when he was in Fairport. He seemed very fond of his mother and of Miss Laura, and however grave his face might be when he was looking at Mr. Maxwell, it always lighted up when he turned to them. "What dog is that?" he said at last, with a puzzled face, and pointing to...

Excerpt: ...panting, shouting, laughing, and all just got what they could. Ginger seized the remnants of a cold ham and picked the bone, George with great gusto drank a whole jar of cream, William and Douglas between them ate a gooseberry pie, Henry ate a whole currant cake. Each foraged for himself. They ate two bowls of cold vegetables, a joint of cold beef, two pots of honey, three dozen oranges, three loaves and two pots of dripping. They experimented upon lard, onions, and raw sausages. They left the larder a place of gaping emptiness. Meanwhile cook

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...Admiration for the chivalric bearing of a captive, the recollection of a past favor, or a sudden impulse of compassion, were sufficient to decide the question of adoption. When the perils of the gantlet, which was an enviable lot compared with the fate of the rejected, were over, he ceased to be an enemy, and became an Iroquois. Not only so, but he was received into the family by which he was adopted with all the cordiality of affection, and into all the relations of the one whose place he was henceforth to fill. By these means all recollections of his distant kindred were gradually effaced, bound as he was by gratitude to those who had restored a life which was forfeited by the usages of war. If a captive, after adoption, became discontented, which is said to have been seldom the case, he was sometimes restored, with presents, to his nation, that THE HUNT they might know he had lost nothing by his captivity among them.(104) The rejected captives were then led away to the torture, and to death. It is not necessary to describe this horrible practice of our primitive inhabitants. It is sufficient to say that it was a test of courage. When the Indian went out upon the warpath, he prepared his mind for this very contingency, resolving to show the enemy, if captured, that hir courage was equal to any trial, and above the power of death itself. The exhibitions of heroism and fortitude by the red man under the sufferings of martyrdom, almost surpass belief. They considered the character of their nation in their keeping, and the glory of the race as involved and illustrated in the manner of their death. A slight notice of a few of their customs in relation to the hunt, will close this desultory chapter. The deer, the elk, the moose, the bear, and several species of...