28 THE AMERICAN BOTANIST 



ing calcium sulphate which is thus rapidly leached out of the 

 soil. In one case reported, rhododendrons treated with 

 aluminum sulphate increased in size 250% more than un- 

 treated plants. If as encouraging results are obtained with 

 other acid soil plants, we may expect our bhteberries to attain 

 unheard-of size and luxuriance, and trailing arbutus and the 

 orchids to become a feature of all good gardens. 



Where Snow Faees Deepest. — The greatest snowfall 

 known in the United States occurs in the Sierra Nevada and 

 Cascade Mountain ranges in the Pacific Coast States, where 

 at some places from 30 to more than 40 feet of snow falls 

 during the winter season, says the Weather Bureau of the 

 United States Department of Agriculture. At Summit Calif., 

 which has an elevation of about 7,000 feet, nearly 60 feet of 

 snow have been recorded in a single season, and about 25 feet 

 in a single month. Snow usually falls on more than 60 

 days of the year in northern New York, the upper peninsula 

 of Michigan, northern Minnesota, and northern North Dakota, 

 as well as in the higher elevations of the northern Rocky 

 Mountains. Snow may be expected on as many as 30 days as 

 far south as southeastern Pennsylvania, central Ohio, 

 southern Wisconsin, and southern South Dakota, and on 10 

 days in southern \"irginia, western North Carolina, the 

 northern portions of Tennessee and Arkansas, central Okla- 

 homa, and northwestern Texas. In extreme southern South 

 Carolina, south-central Georgia, northern Alabama, and south 

 central Texas, however, snow may be expected only on about 

 one day during the winter. 



Speed oe Birds in Flight. — Certain species of hawks 

 have a speed of 200 feet a second, or about 136 miles an hour, 

 according to the U. S. Biological Survey. This might be a 

 suitable rate for a racing airplane. The canvasback duck can 



