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Image from page 210 of “Laboratory exercises to accompany Carhart and Chute’s First principles of physics” (1913)

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Image from page 210 of “Laboratory exercises to accompany Carhart and Chute’s First principles of physics” (1913)
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Identifier: laboratoryexerci00full
Title: Laboratory exercises to accompany Carhart and Chute’s First principles of physics
Year: 1913 (1910s)
Authors: Fuller, Robert W. (Robert Warren), 1871-1953 Brownlee, Raymond B. (Raymond Bedell), b. 1877 joint author Carhart, Henry Smith, 1844- First principles of physics. [from old catalog]
Subjects: Physics
Publisher: Boston, Allyn and Bacon
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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l of the bottom ofthe stopper in the bottle (Fig. 71).The water is heated with a Bunsenburner until it boils, and kept at aboiling temperature for 5 minutes.While it is boiling, the temperatureof the water is taken with a ther-mometer and recorded. Observewhat happens to the mercury inthe bottle. The beaker is now removed fromthe ring stand. By dipping outhot water and adding cold water,the temperature of the water isbrought approximately to that ofthe room. Care must be takenduring this operation to avoid get-ting any water into the specificgravity bottle. The bottle is now removed from thewater, carefully dried, and again weighed. After being weighed, the bottle is returned to theinstructor, still containing the mercury. The greaterpart of the water in the beaker is to be poured off, with-out losing any mercury. The remaining water and mer-cury is to be disposed of as the instructor may direct. The readings taken should be entered in a tabular formnear the top of the left-hand page.

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Fig. 71. 196 LABORATORY EXERCISES Observations Weight of empty bottle g. Weight of bottle filled with mercury, initial . . g. Weight of bottle with mercury, final …. g. Initial (room) temperature °C. Final (boiling) temperature …… °C. A simple drawing of the apparatus and a brief descrip-tion of the operations in the experiment should follow thetable of observations on the left-hand page. At the top of the right-hand page, place the followingtable of calculated results, making the required computa-tions on the page immediately beneath the table. Calculated Results Initial weight of mercury (a) g. Weight of mercury lost by expansion (b) . . g.Change in temperature (c) °(7. Loss by expansion per degree (d = -] . . . g.Coefficient of cubical expansion I – ) Discussion: Explain clearly how the loss in weight per degree,divided by the original weight, gives the coefficient ofcubical expansion. Conclusion: The coefficient of cubical expansion of mercury relativeto glass is . INCREA

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Image from page 48 of “The principles of agriculture, a text-book for schools and rural societies” (1919)
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Identifier: principlesofagri02bail
Title: The principles of agriculture, a text-book for schools and rural societies
Year: 1919 (1910s)
Authors: Bailey, L. H. (Liberty Hyde), 1858-1954, ed
Subjects: Agriculture
Publisher: New York, The Macmillan company London, Macmillan & co., ltd.
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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beginning to understand it; and if the very soilis unknown to us, how complicated must be thegreat structure of agriculture which is rearedupon it! SUGGJtJSTIOXS ox CHAPTER I 25rt. The word organic refers to unimals and plants or theirproducts and remains ; that is, to things which live and haveorgans. Organic compounds, in chemistry, are those whichhave been built up or produced by the action of a plant oianimal. Modern usage, however, defines organic compounds asthose which contain carbon. Starch, sugar, woody fiber, areexamples. 256. Inorganic compounds are such as are not produced byliving organisms, as all the mineral compounds. They arefound in the earth and air. Salt, potash, iron and gold,lime, are examples. THE CONTENTS OF THE SOIL 29 25c. The ovgauic matter in soils—ttie plant and animalremains—is removed by burning. Let the pupil secure a cupfulof wet soil and carefully weigh it on delicate scales. Then letit dry in the sun, and weigh again ; the difference in weight is

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^^•^4^ Fig. 1. .Showinii the wearing away of mountain peaks and the formation ofsoil at the base. due to tlie loss or evaporation of water. Now place it in amoderately warm oven or on a stove, and after a few minutesweigh again ; more of the water will now have passed off. Nowthoroughly burn or bake it, and weigh ; the loss is now mostlydue to the burning of the organic matter, and part of thismatter has passed off as gas. If there is no perceptible lossfrom the burning, it is evidence that the sample contained littleorganic matter. Note the difference in results between clay andmuck. The pupil may also be interested to try to grow plantsin the baked soil. 30 THE PRINCIPLES OF AGRICULTURE 2firt. The wearing away of rock by the weather may be ob-served wherever stones are exposed. Even granite and marblemonuments lose their polish and luster in a few years. Thesharp and angular projections disappear from the ledges andbroken stones of railway cuts and quarries. The pupil shouldlook fprinciplesofagri02bail

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Image from page 469 of “Railway and locomotive engineering : a practical journal of railway motive power and rolling stock” (1901)
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Identifier: railwaylocomotiv20newy
Title: Railway and locomotive engineering : a practical journal of railway motive power and rolling stock
Year: 1901 (1900s)
Authors:
Subjects: Railroads Locomotives
Publisher: New York : A. Sinclair Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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. Tools such as chisels, saws andhammers are simple machines, and,like engines and other machines ofgreat power, they merely aid the powerin its action. They do not createpower. All machines remain at restuntil acted on by some motive power,and whatever a machine gains inamount of work it loses in time, and what it gains in time it loses in amountof work. This can be readily seen inthe use of the crowbar, by whichweights may be slowly moved, al-though much heavier than a man isable to lift. Machinery not only enables us touse our power more conveniently, butit enables us to use other motivepowers besides our own strength. Thelimit of the power of machinery is thestrength of the materials of which itis made. Machines that will work wellin small models sometimes fail whenmade full size, because when the re-sistance is increased and their ownweight is added, the material will notstand the strain. STRENGTH OF MATERIALS. The determining of how great astrain certain materials will bear, and

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liLECTRIC LOCOMOTIVE ON THE PENN-SYLV.NI. R.ILRO.D. how they may be joined together tothe best advantage, is of the utmostimportance in practical mechanics.The relative strength of materials hasalready been briefly treated of, and itmay be added that rods and beams ofthe same materials and uniform sizeresist breakage in the direction of theirlength with degrees of strength thatvary in a ratio to the areas of theirends. If two rods of equal length andthickness are used in sustaining aweight, it will be found that by increas-ing the area of the end of one rod itwill sustain an increased weight. Thestrength of a horizontal beam sup-ported at each end diminishes as thesquare of its length increases. It ismost easily broken in the center, and if a beam of uniform strength is required,it should taper from the middle to-wards the ends. It should be noted that a given quan-tity of material has more strengthwhen disposed in the form of a hollowcylinder than in any other form thatcan be giv

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Poses and Exercises in Yoga for Weight Loss

Yoga has originated from India many years ago. The word ‘Yoga’ is derived from Sanskrit which means union. It is the union of the mind and body to achieve a well balanced life. Practicing yoga not only helps in toning your body, improving the physical and mental well being, but also helps in fat loss. Yoga for weight loss is very commonly used by most of the people as the awareness is spreading. Many celebrities are using yoga for weight loss nowadays.

Yoga is an effective way to maintain healthy body without any negative side effects. It helps in reducing the fat and increasing the metabolism of the body. There are various school and styles of yoga which depict different ways of practicing yoga. Some of the styles are: Bikram, Kundalini, Astanga and Iyengar. They all aim towards the same goal but in slightly different ways. There are many poses or asanas in yoga for weight loss. Deep breathing in yoga increases the intake of oxygen in the body. Some of the poses and exercises in yoga for weight loss are as below:

1. Pranayam: Pranayam is a set of breathing exercises that have an effective impact on weight loss. Deep breathing done in the proper way helps in reducing the abdominal fat. There are different breathing techniques which can be practiced like kapalbhati, bhastrika, anulom vilom, bharamari and ujjayi pranayam. Kapalbhati is said to be very effective since it involves forceful exhalation of air. Care should be taken that this should be done on an empty stomach only. This is not only good for obesity but also for indigestion and acidity. In Anulom Vilom, one has to close one nostril with the thumb and breathe deeply from the other. This has to be repeated alternating the nostrils. These deep breathing exercises are very helpful and should be done under guidance.

2. Sun Salutations: Sun Salutations or Surya Namaskar is a series of 12 poses which help in weight loss and tone up the whole body. These poses along with sequenced breathing provide a lot of benefits to the body and mind. One should start with 1 or 2 rounds and slowly increase to at least 10 to 12 rounds. People with high blood pressure and pregnant women are advised not to perform this.

3. Bhujanga Asana: This is also called the Cobra Pose. It works on the shoulders, back, arms and other internal organs.

4. Yoga Spinal Twists: This works on your abdominal region and your entire digestive system. Spinal Twists help in burning calories and toning the abs. This is a good yoga for weight loss. Likewise there are many other poses which help in weight loss. One has to learn under guidance and perform slowly.

Yoga for weight loss will be effective only if combined with a proper diet. Eliminate the junk food and carbonated drinks from your diet. Include lot of greens, pulses, sprout, salads and fruits in your food intake to provide the body with the necessary proteins and vitamins. Do not break your yoga routine; do it regularly with dedication. The results may not be very quick but be patient and keep practicing yoga for weight loss. It is important to do yoga under an expert’s guidance. Yoga for weight loss will also result in a toned body, flexible body, less stress and anxiety, increase in concentration, strengthening of physical and mental health.

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Dr Andrew Napier

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