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Science, New Series, Vol. 29, No. 747, Apr. 23, 1909


Previous Issue: New Series, Vol. 29, No. 746, Apr. 16, 1909
Next Issue: New Series, Vol. 29, No. 748, Apr. 30, 1909


Front Matter (1 p.)
A Plea for a Wider and Better Extension of the Knowledge of Sanitary Science, pp. 641-647
W. P. Mason

The Future of Agricultural Chemistry, pp. 647-653
H. J. Wheeler

Scientific Notes and News, pp. 653-655
University and Educational News, pp. 655-656


Discussion and Correspondence
The Fundamental Laws of Matter and Energy, pp. 656-659
Clarence L. Speyers
Mars as the Abode of Life, pp. 659-661
Eliot Blackwelder


Scientific Books
----------------, pp. 661-666
L'Europe Préhistorique
Sophus Müller
Review author[s]: George Grant MacCurdy
----------------, pp. 666-667
Grundriss der Kristallographie fur Studierende und zum Selbstunterricht
Gottlob Linck
Review author[s]: W. S. Bayley
----------------, pp. 667-668
The Cell as the Unit of Life
Allan Macfadyen
Review author[s]: G. N. C.


Scientific Journals and Articles, pp. 668-669
Botanical Notes, pp. 669-670
Charles E. Bessey


Special Articles
A Discussion of Some of the Principles Governing the Interpretation of Pre-Persoonian Names, and Their Bearing on the Selection of a Starting-Point for Mycological Nomenclature, pp. 670-676
Ellas J. Durand


Societies and Academies, pp. 676-678

Previous Issue: New Series, Vol. 29, No. 746, Apr. 16, 1909
Next Issue: New Series, Vol. 29, No. 748, Apr. 30, 1909



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