II CONTENTS. 



Page. 



MaltoHC in aoid-hy<lrolyzecl starch products, (J. W. Rolfe and 1. T. Haddock.. 647 



A ,«tndy in ratHndsc detorinination, 1). I^. J)avolI, jr 647 



Butter and luittcr .•substitutes, V. Scliwcit/er 647 



lodin nunihcr of cotton-sccd oil and some otlier oiln and fats, J. J. A. Wijs. . . 648 



Headings on Zeiss hutyro-refractonieter of edible oils and fats, H. C. Lythgoe. 648 



Acido-butvronietric analyses of whey, V. Wieske 648 



The determination of fat" in skim milk, C. Barthel 648 



Fat in milk by the Adams, (iottlieb, and Gerber methods, M. Siegfeld 648 



Investi^'ations on the ( ;ottliel)-Kose methotlof fat determination, M. Popp 648 



lIydro<;en jieroxid in the examination of milk, C. Arnold and C. Mentsel 648 



New reactions for distinguishinir raw and heated milk, C. Arnold and C. Mentsel. 649 



Examination of milk containing large quantities of preservatives, M. Siegfeld. 649 



A comjiarative study of methods of determining formaldehyde, B. H. Smith . 649 



The estimation of fi.rmaldehyde in milk, B. H. Smith 649 



i\lethod for detecting the addition of low-grade flour to wheat flour, G. Volpino. 649 



Volumetric di'terminations, A. AVohl 649 



Pota,ssium tetroxalate as a titrating reagent, 0. Kiihling •. 649 



Titration of sulphuric acid with benzidine hvdrochlorate, W. J. Miiller and 



II. I )iirkes '- 650 



Impurities in compressed oxygen, M. Berthelot 650 



The determination of carbon dioxid, A. Wohl 650 



The determination of argon in atmospheric air, H. Moissan 650 



Determination of composition of chemical compounds without analysis, G. 



Tammann 650 



The general principles of physical science, A. A. Noyes 650 



The progress in agricultural chemistry, 1902, A. Hilger, T. Dietrich, et al 650 



ijOTANY. 



Acidity of plants, A. Astruc 650 



The significance of ethereal oils in xerophytes, C. Detto 651 



Carbonic acid assimilation in submerged plants, O. Treboux 651 



Growth without oxygen, A. J. Nabokich 651 



Effect of temperature of the soil on growth of roots, P. Kossovich 651 



Influence of colored glass on the red and yellow pigments in plants, E. Laurent. 652 



Influence of Aspergillus niger on the transformation of tlie albuminoids, I. S. 652 



Kosyachenko 



The physiological principles of plant culture, C. Kraus 652 



Poisoning by Lepiota morgani, F. L. Stevens 652 



The conservation and cultivation of medicinal plants, H. Kraemer 653 



METEOROLOGY — CLIMATOLOGY. 



Meteorological observations, J. E. Ostrander and F. F. Henshaw 653 



Central meteorological observatory of Mexico, JNI. E. Pastrana 653 



Meteorology of Tunis, G. Ginestous 653 



^Meteorology of British Guiana, J. B. Harrison 653 



Meteorological observations in Rhodesia, G. Duthie 653 



Weather conditions of South Australia, A. J. Perkins 654 



Normals of the air pressure [in India] , J. Eliot 654 



Meteorological effects of solar and terrestrial physical processes, F. H. Bigelow. 654 

 Hurricanes: Especially those of Porto Rico and St. Kitts, "W. H. Alexander.. 654 

 Weather changes and the appearance of scum on ponds, H. R. Mill, W. Rams- 

 den, and F. J. Hillig 654 



Influence of cultural operations on the production of white frost, A. Petit 654 



Measurement of precipitation, C. F. INIarvin 655 



The new cosmical meteorology, F. H. Bigelow 655 



Weather folklore and local weather signs, E. B. Garriott 655 



Proceedings of convention of Weather Bureau officials at Milwaukee, 1901, 



edited by J. Berry and W. F. R. Phillips 655 



WATER SOILS. 



Irrigation experiments in 1901, J. A. Widtsoe et al 655 



Influence of soil moisture upon chemical composition of certain plant parts, 



J. A. Widtsoe 657 



Irrigation waters and their effects, W. P. Headden 657 



Water used for drinking and similar purposes 657 



