II CONTENTS. 



Page. 



A new indicator for use in detei-mining total acidity of wines, E. G. Runyan.. 618 



A method of determining nicotin in tobacco and tobacco extracts, J. Foth . . . 618 



Three new alkaloids of tobacco, A. Pictet and A. Rotschy 618 



Chemistry of tolmcco smoke, H. Thoms 618 



Official method for analysis of tanning materials 618 



On the determination of formaldehyde, A. G. Craig 618 



The oxalic acid in oi-ganisms, Cipollina 619 



Improvement of Kiister's hydrogen sulphid apparatus, G. Frerichs (ilt) 



Aerometer for use with Reichert-Meissl determination, M. J. Vanderplancken. 619 



Modification of Lansberger apparatus for boiling point, C. N. Riiber 619 



Tables for calculating in quantitative chemical analysis, A. Sartori 619 



The improvement in instruction in technical chemistry, A. Lachmann 619 



BOTANY. 



On the origin of new species of plants, H. de Vries 619 



The plants of westei-n Lake Erie, A. J. Pieters 619 



The flora of the Palouse region, C. V. Piper and R. K. Beattie 620 



The flora of the Red River Valley in Minnesota, W. A. Wheeler 620 



A preliminary list of Minnesota Uredine^e, E. M. Freeman 620 



Plants reported to be poisonous to stock in Australia, J. H. Maiden 620 



Crossing of varieties, K. Sajo^ 620 



The vitality of pollen 620 



The double fecundation of maize, L. ( iuignard 620 



Influence of wounds on formation of i>roteid material in plants, A. Hettlingcr. 620 



Poisonous ])roperties of compounds of nickel and cobalt, 11. Coupin 620 



Poisonous properties of compounds of silver, mercury, gold, eti'., H. Coupin. . 621 



On the toxic value of mercuric chlorid and its double salts, J. F. Clark 621 



Digestive secretion of Nepenthes, Clautrian 621 



The oxidases in higher plants, N. Passerini 621 



Enzyms of fungi , P. Kohnstamm 621 



Decomposition of glucosids by mold fungi, A. Prunstein 621 



A text-book ( if | )lant physiology, D. T. ]\IacD( )Ugal 622 



Southern wild flowers and trees, Alice Lounsberry 622 



BACTERIOLOGY. 



Botanical descriptions of some soil bacteria, O. Gottheil 622 



Notes on Vibrio de)iilriticiins, R. (J. Smith 623 



Value of plating for determining l)aeteria in drinking water, W. C. C. Pakes. . 623 



The soluble ferments or enzyms, E. O. Jordan 623 



Agricultural bacteriology, H. W. Conn 623 



METEOROLOGY. 



Monthly Weather Review, A^ol. XXIX, Nos. 7-9 623 



Yukon weather, U. G. Myers 624 



The Island of Porto Rico, J. L. Cline 624 



Guide to the weather, R. Bornstein 625 



Results of organized effort to prevent hail in Italy, F. Houdaille 625 



Weather control, W. S. Franklin 625 



Cannonading against hail storms, C. Abbe 625 



Modern "weather shooting," J. M. Pernter 625 



The third international hail congress 626 



The hail protection congress, J. Dufour 626 



Storms and hail, I. R. Plumandon 626 



Clouds and their role in the formation of rain, C. Ritter 626 



Practical experiments in frost protection, J. W. Freeman 626 



A new field for kites in meteorology, A. L. Rotch 626 



Use of kites in meteorological work 626 



Instructions for voluntary observers 626 



The Blue Hill meteorological observatory, F. Waldo 626 



Work at station of agricultural climatology of Juvisy, 1900, C. Flammarion.. 627 



Meterological observations, J. E. Ostrander, C. L. Rice, andH. L. Bodfish... 627 



Meteorology, G. Ginestous 627 



Meteorology, P. Boname 627 



Weather Bureau exhibit, Pan-American Exposition, D. T. Maring 627 



