Summary

Van Powell The Mystery of the Fifteen Sounds

When he heard Doctor Ryder’s startling plea, Roger’s clear, gray eyes lighted with a fire of hope and excitement.
To be involved in a mystery in the laboratory was thrilling; but to have a share in restoring the Eye of Om, evidently a priceless gem, would be more so.
His quick mind flashed over the fascinating prospect; but with equal quickness he saw the reason why Grover sat so silent and unimpressed.
A man accused, anxious to return a jewel, would merit help. A man who knew the real taker of the gem and wanted it restored meant possible trouble.
Source: Gutenberg

Van Powell The Mystery of the Fifteen Sounds

It is to show how much of adventure and thrill, excitement and romance can hide behind electrical transformers and tubes of germs, bags of sodium carbonate and humming motors that this experience of a boy in a scientific research laboratory is offered. Perhaps some boy, who has almost decided that the only “real” life involves guns and “rackets,” will be shown how the useful life of the fellow who fights for humanity and not against it brings more thrill and joy and contentment than any of the risky, falsely stimulating adventures that only lead to discredit, sorrow and punishment.
Source: Gutenberg

Van Powell The Mystery of the Fifteen Sounds

Grover and Roger looked.
When light acts on a silver-bromide emulsion, it develops dark grains of silver where light has fallen, leaving the shadows unaffected within the degree that they lack light, thus giving the shadings that become a picture in the positive print.
All over, and for its whole length, the film that had run fully three minutes showed as clear of developed silver as if it had not run through the machine as evidence proved that it had done.
“A card over the lens,” Grover grunted. “Of course! This Joseph Z. Clark is a clever man.”
Source: Gutenberg

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