"In Jan. 1824, at Playford, I was working on the effects of separating the two lenses of an object-glass, and on the kind of eye-piece which would be necessary: also on spherical aberrations and Saturn's figure.

" The senior partner removed his horn-rimmed spectacles and carefully polished the lenses with a bit of chamois, which he produced from his watch pocket, meanwhile resting the muscles of his forehead by elevating his eyebrows until he somewhat resembled an inquiring but good-natured owl.

3, which is a frame having lenses of different powers set into it, and on which, or on the third frame, a small mirror inclined at 45º may be laid.

The following letter, dated September 30, 1840, was to a Mr. Levering in Paris: "Some time since (I believe nearly a year ago) I wrote you to procure for me two lenses and some plates for the Daguerreotype process, but have never heard from you nor had any intimation that my letter was ever received.

They forget that human beings are men with two eyes, and not daguerreotype lenses with one eye, and so are contriving and striving to introduce into their pictures the very defect of the daguerreotype which the stereoscope is required to correct.

"I think by two-legged animals," answered the one who held the powerful lenses to his young eyes.

His chief scientific interest was optics, and he invented the kaleidoscope, and improved Wheatstone's stereoscope by introducing the divided lenses.

He retired to the Hague and took to making lenses, and the study of philosophy.

Subsequently, while at Playford, I ordered cylindrical lenses of an artist named Fuller, living at Ipswich, and these were completed in November, 1824.

The transparent structures through which the rays of light pass represent the lenses.

His eye-sight was peculiar, and required correction by spectacles the lenses of which were ground to peculiar curves according to formulae which he himself investigated: with these spectacles he saw extremely well, and he commonly carried three pairs, adapted to different distances: he took great interest in the changes that took place in his eye-sight, and wrote several Papers on the subject.

"It looks" I adjusted the lenses carefully "like a fire, all right.

Leith grinned as the scientist dipped his lead pencil into his open mouth so that he would be able to dab down first impressions the moment he turned his thick lenses upon the wonders.

Then he and his chum, setting up their cameras on the tripods, aimed the lenses at the advancing flood, at the swung-back gates and at the men on top of the concrete walls, endeavoring to bring into place the emergency dam.

Raoul had placed himself on a gunslide near her, and Ithuel was busy within a few feet of them, dissecting a spy-glass, with a view to clean its lenses.

In the centre of the solid floor, levelled to the utmost perfection, was left a circular pillar supporting the polar axis of an instrument widely differing from our telescopes, especially in the fact that it had no opaque tube connecting the essential lenses which we call the eye-piece and the object-glass, names not applicable to their Martial substitutes.