TWELFTH YEAR. 
VoL. XXILL.. No. 570. 
JANUARY 5, 1894. 
SINGLE Coprigs, TEN CENTS. 
$3.50 PER YEAR, IN ADVANCE. 
CONTENTS. 
River Courses in the Jura Mountains. Emm. 
De Margerie . 
Indiana Academy of Science. 
The Cruise of the Clover—Further Remarks on 
the Aberrations of Audibility of Fog Signals 
—The Methods Used. Arnold Burges John- 
SOT. ccc cece cece eee nce eens nese 3 
Sassafras Trees. Walter J. Quick 6 
The McMillan Chemical Laboratory. De'os 
Pill se jodaan sso asuesoonodocdcoGocndooboasuDauooOds 7 
The Gradual Disappearance of the Range 
Grasses of the West. I. W. Tourney.......... 9 
Meeting of the Iowa Academy of Sciences...... 
Baltimore Meeting of the American Chemical 
Society. Charles Platt 
Letters to the Editor: 
Do Earth Worms Rain Down? Charles B. 
PALMER oooomoopagauconCoondooCOCcde7HOUGRODoO 
Late-Blooming Trees. F. J. Thompson... 1: 
A Correction. W. M. Beauchamp........... 12 
Late-Blooming Trees. Thomas S. Ste- 12 
WViETIS. ccc tee nernreccccccsscvcesrereeeeeece I 
As to Feigned Death in Snakes. H. H. 
PEROT Leaterem ier selojeteialeinisleleiatcieleisisinieloisicisins dlaielere te 2 
The Least Bittern. Fred Mather 
“Por the enlightened owner of gardens and wood- 
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‘ A BOOK OF FLOWERS AND FLOWER LORE. 
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THE MODERN MALADY ; or, Suf- 
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By CYRIL BENNETT. 
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