. Scientific American Volume 92 Number 08 (February 1905) . In the earlier forms of the Laval steam turbines, a5-horse-power motor, with a diameter of 12 centimeters,made about 30,000 revolutions per minute. 164 Scientific American. February 25, 1905. ROCKY MOUNTAIN AVALANCHES. BY DAY ALLEN WILLEY. While avalanches or snow-slides frequently occur in theRocky Mountain region, andmany of them are of great mag-nitude, what is known as the SanJuan district in southwesternColorado is especially notablefor these movements, owing tothe formation of the of the peaks are over13,000 feet
. Scientific American Volume 92 Number 08 (February 1905) . In the earlier forms of the Laval steam turbines, a5-horse-power motor, with a diameter of 12 centimeters,made about 30,000 revolutions per minute. 164 Scientific American. February 25, 1905. ROCKY MOUNTAIN AVALANCHES. BY DAY ALLEN WILLEY. While avalanches or snow-slides frequently occur in theRocky Mountain region, andmany of them are of great mag-nitude, what is known as the SanJuan district in southwesternColorado is especially notablefor these movements, owing tothe formation of the of the peaks are over13,000 feet in height, and theconditions are especially favor-able for the motion of the snow,as the mountain sides are deeplycut with gulches, which formnumerous routes. Consequently,not only in winter, but duringthe spring, miners and othersworking on the slopes of themountains are obliged to be con-tinually on the lookout, for fre-quently without warning an ava-lanche will descend with such. View of One of the Buildings Partly Wrecked. force as to carry with it largeforest trees and bowlders, attain-ing such a velocity that it de-stroys everything in its of the avalanches havecarried a bank of snow over 100feet in depth into the valleyswhich they penetrate, the snowbed covering several acres.■ Despite the caution exercisedby the people on the mountainside, many fatalities have oc-curred, especially in the Telluridemining district, which is locatedin the San Juan region. The worstdisaster thus far recorded oc-curred when a settlement in thevicinity of the Liberty Bell minewas struck. All the buildings inthe path of the avalanche weredestroyed. The wing of one ofthe mine buildings was tornaway, and two engineers wereburied in the snow. A party(Continued on page 166.)
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