52 Botanisches Centralblatt. 



Harvey, R. B. and R. H. True 1918. Root absorption from So- 

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p. 43—146..^ 

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the conductivity of living tissue. (Journ. biol. Chem. XXXVI. p. 



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 Paekard, C. 1918. Difference in the action of radium on green 



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 Rommel, L. G. 1918. Zur Frage einer Reizbarkeit blutender Zellen 



durch hydrostatischen Druck. (Svensk bot. Tidskr. 1918. p. 338—361.) 

 Sinnott, E. W. 1918. Factors determining character and distribution 



of food reserve in woody plants. (Bot. Gaz. LXVI. p. 162— 



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 Snijders, A. J. C. 1918. De sapbeweging in de planten. (De Natuur. 



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 Tammes, T. 1918. Ein neues, einen blauen Farbstoff erzeugendes 



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 Thomas, H. S. 1918. Comparative studies on respiration. IV. The 



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 Trowbridge, C. C. and M. Weil. 1918. The coefficient of expansion of 



living tree trunks. (Science. N. S. XL VIII. p. 348-350.) 

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spinach. (Journ. agr. Res. XV. p. 369—408.) 



