 | Tiberius Cavallo - 1803 - 638 halaman
...fhort focus. The lantern is clofed on every fide, fo that ho light can come out of it, but what pafies .through the lens CD. In the direction of this lens there is a tube, . or apparatus, fixed to the -lantern, which has a lateral aperture from fide to fide, through which... | |
 | Sir Richard Phillips - 1807 - 212 halaman
...plano-convex (usually called a bull's eye) of short focui. The lantern tcra i1 closed on every tide, so that no light can come out of it, but what passes through the lens CI). In the direction of this lens there is a tube x, fig. 50, fixed to the lantern, which has a lateral... | |
 | Edward Augustus Kendall - 1811 - 458 halaman
...objects because VOL. m. 2 K tern there is a thick double convex lens, or a planoconvex (usually called a bull's eye) of short focus. The lantern is closed...come out of it, but what passes through the lens. In the direction of this lens there is a tube .r fixed to the lantern, which has a lateral aperture... | |
 | Edward Augustus Kendall - 1811 - 516 halaman
...On the fore part of IKeJutern there is a thick double convex lens, or a planoconvex (usually called a bull's eye) of short focus. The lantern is closed on every Side, go that no light can come out dP it, but what passes through, the len*. fa the direction of this lensflrerfe... | |
 | Sir Richard Phillips - 1826 - 236 halaman
...fore part of the lantern, there is a thick doable convex lens CD, or a plane-convex (usually called a bull's eye,) of short focus. The lantern is closed...on every side, so that no light can come out of it, except what passes through the lens C D. In the direction of this lens, there is a tube x fig. 57,... | |
 | Sir Richard Phillips - 1826 - 254 halaman
...a thick doable convex lens CD, or a plaue-convcx (usually called a bull's eye,) of short focus. Ths lantern is closed on every side, so that no light can come out of it, except what passes through the lens C D. In the direction of this lens, there is a tube x fig. 57,... | |
 | Francis Lieber, Edward Wigglesworth, Thomas Gamaliel Bradford - 1831 - 620 halaman
...the fore-part of the lantern, there, is a thick double-convex lens, or a planeconvex (usually called A bull's eye), of short focus. The lantern is closed...so that no light can come out of it but what passes tlirough the lens. In the direction of this, lens, there is a tube fixed to the lantern, which has... | |
 | Francis Lieber, Edward Wigglesworth, Thomas Gamaliel Bradford - 1831 - 616 halaman
...fore-part of the lantern, there is a thick double-convex lens, or a planeconvex (usually called a bulPt eye), of short focus. The lantern is closed on every...can come out of it but what passes through the lens. In the direction of this lens, there is a tube fixed to the lantern, which has a lateral aperture from... | |
 | Encyclopaedia Americana - 1831 - 608 halaman
...lantern, there is a thick double-convex 'lens, or a planeconvex (usually called a bull's eye), oí' short focus. The lantern is closed on every side, so that no light can.come out of it but what passes through -the-lens.^ Iu the direction of this lens, there is u tube... | |
 | Francis Lieber, Edward Wigglesworth - 1835 - 608 halaman
...the fore-part of the lantern, there is a thick double-convex lens, or a planeconvex (usually called a bull's eye), of short focus. The lantern is closed...can come out of it but what passes through the lens. In the direction of this lens, there is a tube fixed to the lantern, which has a lateral aperture from... | |
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On the fore-part of the lantern, there is a thick double-convex lens, or a planeconvex (usually called a bull's eye), of short focus. The lantern is closed on every side, so that no light can come out of it but what passes through the lens. 