Lenses

Examples

• This, rising above the water, and provided with reflecting lenses, enabled the steersman to discover the surface conditions and see any near vessel or other object. Various. The Wonder Book of Knowledge.
• He noticed that by holding two of the lenses in a certain position he obtained a large and inverted view of whatever he looked at. Rupert S. Holland. Historic Inventions.
• By using combinations of two or more lenses of various kinds, it is possible to have an image of almost any desired size, and in practically any desired position. Bertha M. Clark. General Science.
• The inventions and improvements in optical instruments gave rise to great advances in the making of lenses, based on scientific principles, and not resting alone on hard work and experience. William Henry Doolittle. Inventions in the Century.
• Many familiar illustrations of lenses, or curved refracting surfaces, and their work, are known to all of us. Bertha M. Clark. General Science.
• Another experimenter, Dumont, made use of a single large plate and a great number of lenses which were successively exposed. Frank Lewis Dyer. Edison, His Life and Inventions.
• Achromatic and other lenses were known, and the microscope, the telescope and spectacles. William Henry Doolittle. Inventions in the Century.
• What is known as the modern refracting telescope is based upon a different combination of lenses than that used by Galileo. Rupert S. Holland. Historic Inventions.
• Such lenses are called convex or converging lenses. Bertha M. Clark. General Science.
• The various types of lenses are shown in Figure 71. Bertha M. Clark. General Science.
• The last three types, called concave lenses, scatter parallel rays so that they do not come to a focus, but diverge widely after passage through the lens. Bertha M. Clark. General Science.
• By a nice arrangement of mirror and lenses attached to a firearm the same object may be accomplished. William Henry Doolittle. Inventions in the Century.
• Their lenses for telescopes and microscopes and photographic cameras, and glass and prisms, and for all chemical and other scientific work, have a worldwide reputation. William Henry Doolittle. Inventions in the Century.
• The image, magnified by the lenses of the electric lamp, could thus be distinctly seen without being too brilliant to dazzle the eyes. Frederick C. Bakewell. Great Facts.
• Kepler studied Galileo’s instrument, and then designed one consisting of two convex lenses. Rupert S. Holland. Historic Inventions.
• He had also now learned to make the lenses adjustable, by fixing the tubes that held them so that they could be drawn out of, or pushed into the main tube of the telescope. Rupert S. Holland. Historic Inventions.
• The story goes that an apprentice of Hans Lipperhey, an optician of Middleburg, in Holland, was, one day in October, 1608, playing with some spectacle lenses in his master’s shop. Rupert S. Holland. Historic Inventions.
• He told Master Hans about this, and the optician fixed two lenses in a tube, and looking at the weathercock on a neighboring steeple saw that it seemed much nearer and to be upside down. Rupert S. Holland. Historic Inventions.
• It consists of two great lenses, each nine feet in diameter, between which, in their focus, is placed a 9,000 candle power arc light. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• In the compound two or more lenses are so arranged that the image formed by one is magnified by the others, and viewed as if it were the object itself. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• By means of other lenses and prisms an image of the external object is thus made visible to those within the submarine. Various. The Wonder Book of Knowledge.
• Lenses are very similar to prisms; indeed, two prisms placed as in Figure 69, and rounded off, would make a very good convex lens. Bertha M. Clark. General Science.
• But Sir Charles Wheaton in 1838 constructed the first instrument, and in 1849 Brewster introduced the present form of lenticular lenses. William Henry Doolittle. Inventions in the Century.

Typist: Waldo