Science and Industry: 1898-99, Τόμος 3Colliery Engineer Company, 1899 |
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Σελίδα 11
... called electrical resistance . The quantity of this electrical resistance which any current can overcome is , however , limited by the current pressure ; that is to say , if a given pressure will force a certain current through a known ...
... called electrical resistance . The quantity of this electrical resistance which any current can overcome is , however , limited by the current pressure ; that is to say , if a given pressure will force a certain current through a known ...
Σελίδα 12
... called an ampere - meter ( that is , a meter , or measure , of amperes ) . This word ampere - meter is often shortened to ammeter . In electrical manufacturing establishments particularly , and in practice generally , the latter desig ...
... called an ampere - meter ( that is , a meter , or measure , of amperes ) . This word ampere - meter is often shortened to ammeter . In electrical manufacturing establishments particularly , and in practice generally , the latter desig ...
Σελίδα 13
... called a galvanoscope . When it is accurately constructed , and supplied with a scale show- ing how many degrees the needle turns when a given current flows in the coil , the instrument becomes an actual measure , or meter , of currents ...
... called a galvanoscope . When it is accurately constructed , and supplied with a scale show- ing how many degrees the needle turns when a given current flows in the coil , the instrument becomes an actual measure , or meter , of currents ...
Σελίδα 14
... called an ampere- meter . A device of this kind would , how- ever , be too delicate too sensitive - for practical work . The commercial ammeter , while embodying principles similar to those just stated , is constructed in a different ...
... called an ampere- meter . A device of this kind would , how- ever , be too delicate too sensitive - for practical work . The commercial ammeter , while embodying principles similar to those just stated , is constructed in a different ...
Σελίδα 17
... called forth so much useless discussion or so many worthless nostrums as that of boiler incrustation . The great mistake made by vendors of patent nostrums for pre- venting or curing scale in steam - boilers is that , having found a ...
... called forth so much useless discussion or so many worthless nostrums as that of boiler incrustation . The great mistake made by vendors of patent nostrums for pre- venting or curing scale in steam - boilers is that , having found a ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acid alternating current ammeter amount amperes angle ANS.-The body boiler carbon catalogue cent circle circuit coil color compression connected continued fraction Corliss valve crank cubic curve cylinder diagram diameter direction distance drawing dynamo electric electromotive force engine equal equation feet figure flow foot-pounds force formula gear give given heat HOME STUDY MAGAZINE horsepower instrument iron lamp larvæ length load machine magnet means measured mechanical method miles minute motion motor move obtained paper passes pipe piston plate pointer position pounds per square practical pressure pulley pump quantity resistance revolutions per minute rotation Scranton shaft shown in Fig side soda speed square inch steam steam engine steel stress stroke supply surface temperature tion tube valve velocity vessel volts weight wheel wire
Δημοφιλή αποσπάσματα
Σελίδα 600 - DEAR MADAM: I have been shown in the files of the War Department a statement of the AdjutantGeneral of Massachusetts that you are the mother of five sons who have died gloriously on the field of battle. I feel how weak and fruitless must be any words of mine which should attempt to beguile you from the grief of a loss so overwhelming. But I cannot refrain from tendering to you the consolation that may be found in the thanks of the Republic they died to save. I pray that our heavenly Father may assuage...
Σελίδα 533 - To live content with small means; to seek elegance rather than luxury, and refinement rather than fashion ; to be worthy, not respectable, and wealthy, not rich ; to...
Σελίδα 601 - With light and heat refulgent. Then thy sun Shoots full perfection through the swelling year: And oft thy voice in dreadful thunder speaks, And oft at dawn, deep noon, or falling eve, By brooks and groves in hollow-whispering gales.
Σελίδα 240 - Cement and Concretes, Quantities of Materials in given Sizes and Dimensions of Wood, Brick and Stone; and full and complete Bills of Prices for Carpenter's...
Σελίδα 547 - The horse power of a steam engine is given by the equation , plan = ~ where p = mean effective pressure in pounds per square inch, l = length of stroke in feet, a = area of piston in square inches, n = number of strokes per minute, or twice the number of revolutions per minute.
Σελίδα 328 - ... the amount of heat necessary to raise the temperature of 1 pound of water 1 degree Fahrenheit.
Σελίδα 600 - Dear Madam : I have been shown in the files of the War Department a statement of the Adjutant General of Massachusetts that you are the mother of five sons who have died gloriously on the field of battle. I feel how weak and fruitless must be any words of mine which should attempt to beguile you from the grief of a loss so overwhelming. But I cannot refrain from tendering to you the consolation that may be found in the thanks of the republic they died to save. I pray that our Heavenly Father may...
Σελίδα 352 - When these differences occur the surveyor will in all cases establish the missing corner by proportionate measurements on lines conforming to the original field notes and by the method followed in the original survey. From this rule there can be no departure, since it is the basis upon which the whole operation depends for accuracy and truth.
Σελίδα 597 - There are many more shining qualities in the mind of man, but there is none so useful as discretion ; it is this indeed which gives a value to all the rest, which sets them at work in their proper times and places, and turns them to the advantage of the person who is possessed of them. Without it, learning is pedantry, and wit impertinence ; virtue itself looks like weakness ; the best parts only qualify a man to be more sprightly in errors, and active to his own prejudice.
Σελίδα 436 - IMPROVED. This popular monthly contains a large number of short, easy, practical, interesting and popular scientific articles, that can be appreciated and enjoyed by any intelligent reader, even though he knew little or nothing of science. It is intended to interest those who think. Profusely Illustrated.