Page:Popular Science Monthly Volume 69.djvu/283

Rh point in the bottom, while the lighter particles and the large stones are thrown on the edge of the bowl and are from time to time scraped away with the hand, being examined meantime. While the vision of

those engaged in this process is very sharp and they will frequently take out from sand and pebbles diamonds smaller than a pin's head, yet from investigation I know that by this method many large