National Geographic : 1923 Jan
THE MAGIC BEAUTY OF SNOW AND DEW 105 THE TREASURES OF THE SNOW The delicate tracery of many snow crystals is brought out in greater detail by photographing them on a glass slide, with light transmitted from below by means of a mirror. The middle crystal in the second row from the top was photographed in 1886 and was the first specirrien of outstanding beauty to be secured. The middle crystal of the top row is a remarkable "spider web" form. The specimens on this page are magnified from 8 to 60 diameters.