The Popular Educator, Τόμος 6John Cassell, 1855 |
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Σελίδα 412
... equal quantity of polarised light , and that the reunion of these two pencils produces natural light . We may therefore regard ordinary light as formed of two equal pencils , polarised at right angles . As a single plate of glass never ...
... equal quantity of polarised light , and that the reunion of these two pencils produces natural light . We may therefore regard ordinary light as formed of two equal pencils , polarised at right angles . As a single plate of glass never ...
Σελίδα 417
... equal factors ; 1 for a3 X a3 Xa3 = a . On the other hand , denotes the third power of the fourth root of c , or the fourth root of the third power . One expression is equivalent to the other . .3 equal to ? equal to ? 1. What is a equal ...
... equal factors ; 1 for a3 X a3 Xa3 = a . On the other hand , denotes the third power of the fourth root of c , or the fourth root of the third power . One expression is equivalent to the other . .3 equal to ? equal to ? 1. What is a equal ...
Σελίδα 418
... equal to the product of the roots of its factors ; that is , 8 = √ 4 × √2 . But 42. Instead of 4 , therefore , we may sub- stitute its equal 2. We then have 2 × √2 , or 2√2 . 2 26. Reduce Va2 z . Ans . √ a2 418 THE POPULAR EDUCATOR .
... equal to the product of the roots of its factors ; that is , 8 = √ 4 × √2 . But 42. Instead of 4 , therefore , we may sub- stitute its equal 2. We then have 2 × √2 , or 2√2 . 2 26. Reduce Va2 z . Ans . √ a2 418 THE POPULAR EDUCATOR .
Σελίδα 426
... equal to that of polarisation . Lastly , an annular disc k , is capable of being fixed at any height by means of a thumb - screw . A second circle a , supported by the other , is capable of being inclined at various angles , and has a ...
... equal to that of polarisation . Lastly , an annular disc k , is capable of being fixed at any height by means of a thumb - screw . A second circle a , supported by the other , is capable of being inclined at various angles , and has a ...
Σελίδα 427
... equal to the angle of polarisa- tion , the consequence of which is , that the light reflected by the glass m in the direction b da , is polarised . In the centre of the divided circle h , in the tube a , and perpendicular to the axis b ...
... equal to the angle of polarisa- tion , the consequence of which is , that the light reflected by the glass m in the direction b da , is polarised . In the centre of the divided circle h , in the tube a , and perpendicular to the axis b ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
according action adjective answer appear attraction become body bring called cause cent cloth coal combination common complete Compound consequently consists contains copper covers decimal direction divided effect electricity English English word equal equation exercise existence experiment expressed feeling figure fluid force French future Gerund give given glass Greek hand hold INDICATIVE INDICATIVE MOOD influence interest kind less LESSONS letters light magnetic manner means metallic mind MOOD moral Multiply nature needle negative noun object observed Past period person pile plate poles positive possess Present principle produced pronounced Pronunciation quantity ratio reason Reduce regard remain represented root rule sentence simple sound Spanish speak square syllable Tenses term thing thou tion turn verb virtue vowel whole
Δημοφιλή αποσπάσματα
Σελίδα 684 - No more the woodman's ballad shall prevail ; No more the smith his dusky brow shall clear, Relax his ponderous strength, and lean to hear...
Σελίδα 700 - Toll for the brave ! Brave Kempenfelt is gone ; His last sea-fight is fought ; His work of glory done. It was not in the battle ; No tempest gave the shock ; She sprang no fatal leak ; She ran upon no rock.
Σελίδα 684 - Yes ! let the rich deride, the proud disdain These simple blessings of the lowly train ; To me more dear, congenial to my heart, One native charm, than all the gloss of art...
Σελίδα 405 - This is that which I think great readers are apt to be mistaken in. Those who have read of everything are thought to understand everything too; but it is not always so. Reading furnishes the mind only with materials of knowledge; it is thinking makes what we read ours.
Σελίδα 684 - Where once the sign-post caught the passing eye, Low lies that house where nut-brown draughts inspired, Where grey-beard mirth and smiling toil retired, Where village statesmen talk'd with looks profound, And news much older than their ale went round. Imagination fondly stoops to trace The parlour splendours of that festive place...
Σελίδα 684 - Ye friends to truth, ye statesmen who survey The rich man's joys increase, the poor's decay, 'Tis yours to judge, how wide the limits stand Between a splendid and a happy land.
Σελίδα 699 - Shoots into port at some well-havened isle, Where spices breathe, and brighter seasons smile, There sits quiescent on the floods, that show Her beauteous form reflected clear below, While airs impregnated with incense play Around her, fanning light her streamers gay; — So thou, with sails how swift! hast reached the shore " Where tempests never beat nor billows roar," And thy loved consort on the dangerous tide Of life long since has anchored by thy side.
Σελίδα 670 - The style of an author should be the image of his mind, but the choice and command of language is the fruit of exercise. Many experiments were made before I could hit the middle tone between a dull chronicle and a rhetorical declamation : three times did I compose the first chapter, and twice the second and third, before I was EDWAHD GIBBON tolerably satisfied with their effect.
Σελίδα 700 - Slaves cannot breathe in England ; if their lungs Receive our air, that moment they are free, They touch our country, and their shackles fall.
Σελίδα 700 - No powder'd pert proficient in the art Of sounding an alarm, assaults these doors Till the street rings. No stationary steeds Cough their own knell, while, heedless of the sound, The silent circle fan themselves and quake. But here the needle plies its busy task, The pattern grows, the well-depicted...