442 EXPERIMENT STATION RECORD. 



occurrence of aluminium in the various products named. The use of the book is 

 facilitated by a detailed index. 



On the presence of normal formaldehyde in the products of combustion 

 and in smoke, A. Trim. at (Compt. Rend. Acad. Sci. Paris, 138(1904^. No. 25, pp. 

 1613-1615 I. 



The spectro-photoruetric determination of small quantities of carbon 

 monoxid in the air, L. de Saint-Martin i Compt. Rend. Acad. Sci. Paris, 139 (1904), 

 No. l,pp. 46-49, fig. l). 



An evaporimeter, A. Mitscherlich (Landw. Vers. Stat., CO (1904) , p. 63). — This 

 consists of a clay cell such as is used in electric batteries kept saturated from within. 

 The advantage claimed for this apparatus is that it is not affected by rain and other 

 weather conditions and so may be used in the open. 



BOTANY. 



Report of the botanist, P>. I). Halsted and J. A. Kelsey I New Jersey Stas. Rpt. 

 1903, pp. 461-554, pis. 13). — A considerable portion of the report of the botanist is 

 taken up with experiments in plant breeding, which are noted elsewhere (p. 464). A 

 brief account is given of experiments with fungicides, which has already been noted 

 (E. S. R., 15, p. 274). 



The distribution of asparagus rust throughout the United States, as indicated by 

 correspondence with botanists of the different experiment stations, is shown. Exami- 

 nation of the plats of asparagus cultivated at the station showed the presence of the 

 rust during the late autumn and at no time was it very severe in its attack. An 

 inspection of the plants in November showed only traces of the disease upon the 

 varieties Palmetto and Argenteuil, while other varieties were affected to an extent of 

 about 10 per cent. This is quite a reduction in the amount of injury over the pre- 

 vious seasons, when from 20 to 75 per cent of the plants were injured. 



Studies on the powdery mildews of the United States are given, showing their 

 distribution, classification, development, etc., and special notes are given on the 

 powdery mildews affecting the various economic plants. Remedies for their control 

 are noted, and attention called to a statement in a previous publication (E. S. R., 

 15, p. 274) on the value of kerosene emulsion for the prevention of powdery mildews 

 on hothouse-grown plants. 



In an experiment in which plants were sprayed at intervals of about 1 week with 

 water in which copper filings had been kept for some time, the sprayed plants were 

 less attacked by the powdery mildew at the end of the experiment than check plants 

 grown under otherwise similar conditions. The paper on the mildews concludes 

 with a list of the species and their distribution throughout the United States, together 

 with their host plants and a bibliography of publications relating to them. 



In continuation of the previous report (E. S. R., 15, p. 161), the authors report on 

 fungi as related to weather, the season covered by the report having been one espe- 

 cially suited to the development of certain fungi. In addition to mentioning the 

 occurrence of certain diseases, notes are given on the mildew of Lima beans, the rot- 

 ting of potatoes, tomato diseases, diseases of the pear orchard, etc., and the report 

 concludes with a record of temperatures for the past 15 years. 



On the change of the albuminoid substances in moldy fodders, 31. F. 

 Ivanov (Collection Works Kharkov Vet. Inst., >;. pp. 1-85; abs. in Zhur. Opuitn. Agron. 

 [Jour. E.rpt. Landw.], 5 (1904), No. 2,'pp. 263, .''/;).— This is a series of investigations 

 carried on under the direction of Prof. S. A. Ivanov, on the effect produced on 

 fodders by various molds. 



In the first series of experiments Penicillium glaucum and an unknown brown mold 

 were grown on flour obtained from Hungarian and Zhelanni oats. When the molds 

 were grown on the Hungarian oats, which have a low nitrogen content, nitrogen was 



