A London Encyclopaedia, Or Universal Dictionary of Science, Art, Literature and Practical Mechanics: Comprising a Popular View of the Present State of Knowledge : Illustrated by Numerous Engravings, a General Atlas, and Appropriate Diagrams, Volumen16Thomas Curtis Thomas Tegg, 1829 |
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Página 194
... glass , he constructed , in 1733 , several compound object glasses , which were calculated not only for avoiding all ... flint glass and of crown glass , it was easy to produce the combination required ; but this ingenious artist was not ...
... glass , he constructed , in 1733 , several compound object glasses , which were calculated not only for avoiding all ... flint glass and of crown glass , it was easy to produce the combination required ; but this ingenious artist was not ...
Página 221
... flint glass with a refracting angle of 65 ° to correct it , a large secondary spec- trum being left , having the uncorrected green towards the vertex of the prism . 232. If the candle at R is kept steady , and the plate A B turned round ...
... flint glass with a refracting angle of 65 ° to correct it , a large secondary spec- trum being left , having the uncorrected green towards the vertex of the prism . 232. If the candle at R is kept steady , and the plate A B turned round ...
Página 246
... flint glass by Mr. Parker . This lens was three feet in diame- ter , and , when mounted , exposed a surface of 330 square inches to the sun's light ; its focal distance was three feet nine inches , and the dia- be effected by forming a ...
... flint glass by Mr. Parker . This lens was three feet in diame- ter , and , when mounted , exposed a surface of 330 square inches to the sun's light ; its focal distance was three feet nine inches , and the dia- be effected by forming a ...
Página 247
... flint- glass proper for a solid lens of great dimensions is in this construction completely removed . 2. If impurities exist in the glass of any of the spherical segments , or if an accident happen to any of them , it can be easily ...
... flint- glass proper for a solid lens of great dimensions is in this construction completely removed . 2. If impurities exist in the glass of any of the spherical segments , or if an accident happen to any of them , it can be easily ...
Página 248
... glass . 403. Dr. Wollaston , in order to allow the eyes a considerable latitude without fatigue , invented a ... flint and crown glass , M. Frauenhefer made use of prisms of these two kinds of glass , having their respective angles small ...
... glass . 403. Dr. Wollaston , in order to allow the eyes a considerable latitude without fatigue , invented a ... flint and crown glass , M. Frauenhefer made use of prisms of these two kinds of glass , having their respective angles small ...
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Términos y frases comunes
afterwards ancient angle angle of incidence aperture appear axis Bocchus body brass Cæsar called cause celebrated church Cicero coast coins Colonia color common consists copper Crown glass crystal denarius distance double refraction drachma Dryden earth east emperor equal feet figure Flint glass four Gallienus glass gold Greek hath head inches inhabitants instrument island Jugurtha Julius Cæsar kind king lens light lines Macedon manner Masinissa medals ment metal miles mother-of-pearl motion nature Nubia Numidia object object-glass observatory observed ocean optical orator orichalcum Paradise Lost pass person pieces plane plants plate polarisation principal prism produced quantity Quintilian rays reflected refraction river Roman Rome round says seen sestertius shadow Shakspeare side silver sometimes Spain species supposed surface telescope thing tion town tree whole words yellow
Pasajes populares
Página 430 - But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.
Página 407 - Mercy to him that shows it is the rule And righteous limitation of its act, By which Heaven moves in pardoning guilty man : And he that shows none, being ripe in years, And conscious of the outrage he commits, Shall seek it, and not find it, in his turn.
Página 188 - Heaven reserv'd in pity to the poor, No pathless waste or undiscovered shore ? No secret island in the boundless main ? No peaceful desert yet unclaimed by Spain ? Quick let us rise, the happy seats explore And bear oppression's insolence no more.
Página 377 - Tower-hill, where he is said to have died of want; or, as it is related by one of his biographers, by swallowing, after a long fast, a piece of bread which charity had supplied. He went out, as is reported, almost naked, in the rage of hunger, and, finding a gentleman in a neighbouring coffee-house, asked him for a shilling. The gentleman gave him a guinea; and Otway going away, bought a roll, and was choked with the first mouthful.
Página 430 - For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband : else were your children unclean ; but now are they holy.
Página 72 - The barge she sat in, like a burnish'd throne, Burn'd on the water ; the poop was beaten gold, Purple the sails, and so perfumed that The winds were love-sick with them, the oars were silver, Which to the tune of flutes kept stroke, and made The water which they beat to follow faster, As amorous of their strokes.
Página 166 - When any one heareth the word of the kingdom, and understandeth it not, then cometh the wicked one, and catcheth away that which was sown in his heart; this is he which received seed by the way side.
Página 75 - Again, ye have heard that it hath been said by them of old time, thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths: but I say unto you, Swear not at all; neither by heaven; for it is God's throne: nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King. Neither shalt thou swear by thy head, because thou canst not make one hair white or black But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these...
Página 181 - I think we may as rationally hope to see with other men's eyes, as to know by other men's understandings. So much as we ourselves consider and comprehend of truth and reason, so much we possess of real and true knowledge. The floating of other men's opinions in our brains makes us not one jot the more knowing, though they happen to be true.
Página 99 - twas a pleasing fear; For I was as it were a child of thee, And trusted to thy billows far and near, And laid my hand upon thy mane, — as I do here.