This Will Indeed Be A Little Gem — Mario V. Farina

Philip Stanton finds a little device that he discovers is able to transport people over great distances at high speed. He names the device, Little Gem. He learns how to use it and travels to Manhattan to meet with the wife of the inventor of the device, James Hardesty. It seems that Dr. Hardesty was injured while testing the device and will now ask Philip to do something that requires a great deal of courage and a penchant for adventure. This is Science Fiction as you've never seen it before.