Bd. XCIIl. No. 9. XXiV. Jahrgang. 



Botanisches Centralblatt. 



Referirendes Oman 



aer 



Association Internationale des Botanistes 



für das Gesammtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice-Präsidenten: des Secretärs : 



Prof. Dr. K. Goebef. Prof. Dr. F. 0. Bower. Dr. J. P. Lotsy. 



und der Redactions-Commissions-Mitglieder : 



Prof. Dr. Ch. Flahault und Dr. Wm. Trelease. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 

 Dr. J. P. Lotsy, Chefredacteur. 



VF ^r Abonnement für das halbe Jahr 14 Mark 



durch alle Buchhandlungen und Postanstalten. 



1903. 



Alle ffir die Redaction bestimmten Sendungen sind za richten an Herrn 

 Dr. J. P. LOTSY, Chefredacteur, Leiden (Holland), Oude Rijn 33 a. 



Anonymus. U. S. Department of Agriculture. Year- 



book 1902. Washington, Government Printing Office, 1903. 



Contains the following articles of more or less botanical interest: 



Report of the Secretary outlining the work done during the past 

 year, and the plans for the Coming year, 



Practicability of forest planting in the United States. 

 Wm. L. Hall. 



The work being done in the east far exceeds any previous efforts 

 in similar lines and is being conducted on strictiy business principles. 

 In the middle west there are already several large plantations and much 

 planting is constantly being done in woodlots and wind-breaks. The 

 government has taken up the problem of restocking the forest reserves 

 in the far west. 



The contamination of drinkingwaterby Algae. G. T. Moore. 



Algae are known to cause ill tastes and odors in drinking water. 

 This is not poisonous but spoils the water for drinking purposes. The 

 Schizophyceae are especially bad in this respect. A key is given for 

 distinguishing the genera. Diatoms may also cause similar troubles. 

 Uroglena, one of the Syngeneticeae, is responsible for more trouble than 

 any other one organism. There is no positive method of remedy as yet, 

 but the experiments of the Department indicate that there may soon be 

 one found. 



Industrial progress in plant work. B. T. Qalloway. 



The experiments in breeding corn for certain purposes have been 

 very successful and are being followed with great interest by the farmers. 

 The improvement of wheat is greater than for any other grain. New 

 varieties have been bred which yield larger crops and varieties have 

 been produced which are rust-proof. The total value of these results 

 is immense and as yet is hardly realized. The building up of the 

 rice industry is very striking, as is also the success in breeding disease- 

 resistant varieties of cotton. The progress in all lines is excellent and 

 is being taken up by the American farmer, as far as the results seem 

 to justify. 



Botan. Centralbl. Bd. XCIII. 1903 14 



