sun-glass

Conscious attention concentrates and even specializes mental energy as the sun-glass concentrates and intensifies the heat of the rays of the sun.

The Doctrine and Practice of Yoga A. P. Mukerji

That day, August 31st, we took refuge in the broom, which was still showing its yellow blossom, and, as the, sun came out occasionally, we lit our pipes with Ted's sun-glass.

Three Times and Out: A Canadian Boy's Experience in Germany Nellie L. McClung 1918

Edwards had the sun-glass, shaving-soap and brush, and other things to correspond with mine.

Three Times and Out: A Canadian Boy's Experience in Germany Nellie L. McClung 1918

Edwards had a sun-glass, which we thought we would use for lighting our pipes when the sun was shining, and thus conserve our supply of matches.

Three Times and Out: A Canadian Boy's Experience in Germany Nellie L. McClung 1918

Two days ago, for trying to dazzle him during lessons with a sun-glass, he gave a boy named Dawkins 500 lines.

Punch, or the London Charivari, Vol. 146, February 4, 1914 Various 1898

In the first case, we may liken it to the action of the sun-glass through which the sun's rays are concentrated upon an object, the result being that the heat is gathered together at a small given point, the intensity of the same being raised many degrees until the heat is sufficient to burn a piece of wood, or evaporate water.

A Series of Lessons in Raja Yoga William Walker Atkinson 1897

They are able to focus the mind upon a small thing with remarkable intensity, just as the rays of the sun may be focused through a "sun-glass" and caused to ignite linen, or, on the other hand, they are able to send forth the mind with intense energy, illuminating whatever it rests upon, just as happens in the case of the strong electric searchlight, with which many of us are familiar.

A Series of Lessons in Raja Yoga William Walker Atkinson 1897

But if it is passed through the sun-glass of attention, and focused first over one part, and then over another, and so on, the matter may be mastered in detail, and a result accomplished that will seem little less than marvelous to those who do not know the secret.

A Series of Lessons in Raja Yoga William Walker Atkinson 1897

"There are some driftwood and seaweed," he said; "with my sun-glass I can soon have a bonfire."

The Changing Sun 1894

Arrived in New York, where the city was burning as if under a sun-glass, he found his chief subject for consideration to be the choice of a club at which to lunch.

The Inner Shrine Basil King 1893