123 



performed in the presence of the class are not only smaller in 

 number, but much simpler than when a sample of the air must 

 be removed to be tested. 



In the illustration the six jars, besides the empty one, contain, 

 respectively, green leaves, roots, stems, variously colored flowers, 

 germinating seeds, and some kind of fleshy fungus. 

 New York Botanical Garden. 



NEWS ITEMS 



Professor H. A. Winkenwerden of the U. S. Bureau of For- 

 estry, is to succeed Professor J. F. Baker as professor of forestry 

 at the Colorado School of Forestry, 



Mr. R. H. Biffen, whose researches on the hybridization of 

 wheat and barley have attracted much attention, has been elected 

 to the recently established chair of agricultural botany at Cam- 

 bridge University. 



The Graduate School of Agriculture will hold its third session 

 at Ithaca and Geneva, beginning July 6, 1908, and continuing for 

 a month. The botanical subjects included are Agronomy and 

 Horticulture. 



The Marine Biological Laboratory will hold its twenty-first 

 session at Woods Hole, from June i to October i, 1908. The 

 work will include embryology and botany, the latter being under 

 the direction of Dr. George T. Moore, 



There is to be held from September 14 to 26 of this year in 

 Olympia Hall, London, England, an International Rubber and 

 Allied Trades Exhibition. Professor Francis E. Lloyd, a mem- 

 ber of the Torrey Club, is one of the Mexican Committee, of 

 which Dr. Pehr Olsson-Seffer is Chairman. 



The nineteenth annual session of the Biological Laboratory of 

 the Brooklyn Institute of Arts and Sciences will be held at Cold 

 Spring Harbor for six weeks, beginning Wednesday, July i. 

 The laboratory is also open for investigators during the entire 

 summer. The courses offered include cryptogamic botany, plant 

 ecology, and beginning research in botany. 



