Issue 5 and Volume 67.

CORRESPONDENCE Fire from Sun Ray Through Aquarium To the Editor: I read with a great deal of interest the article appearing in your issue of January 21 by Chief Howard L. Stanton, of Norwich, Conn., entitled “Fires from Sun Ray Concentration Through Glass,” and thought my experience in this line might be of interest to him as well as to some of your other readers. On Sunday, December 9, 1907, at 2 p. m., I was walking past one of our drug stores when I noticed a thin spiral of smoke rising from some of the articles displayed in the window; on closer inspection I noticed that the smoke was rising from a display card of about 12 inches square on which some leather pocket knife cases were displayed, this card had been burned or charred across the face for a distance of about three or four inches for a…

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