242 



The Rubber Tree of South Africa, Funtumia elastica Stapf., is 

 the best known rubber tree of this family. Alstonia scholaris 

 R. Br. of South Asia, Dyera castulata Hook, of the same region^ 

 Dyera Lowii Hook, of Borneo (the latter two producing the 

 resinous product called Jelutong), Mascarenhasia sp. of Mada- 

 gascar, and several species of Plumiera from Mexico are also 

 trees that produce more or less rubber. 



"Another family of scientific interest is the Celastraceae. 

 Many members of this family possess special caoutchouc cells 

 in the stems, leaves, and fruit. These plants do not "bleed" 

 on cutting, but the threads of caoutchouc are found scattered 

 throughout the plant tissues of recent growths and may be 

 separated by mechanical means. 



"Several tropical genera of Loranthaceae furnish rubber known 

 as Mistletoe Rubber. They are of no commercial importance." 



Dr. Marshall A. Howe exhibited a very beautiful and instruc- 

 tive series of dried specimens of marine algae from Monterey 

 Bay, California, owned by Mr. H. B. Snyder of New York City. 

 Comments upon the rare forms were made and some comparisons 

 were instituted between these luxuriant well-prepared specimens 

 and those that commonly find their way into herbaria. 



Dr. W. A. Murrill then exhibited a recently collected specimen 

 of Arcturus horealis. 



Meeting adjourned to October lo, 1911. 



B. O. Dodge, 



Secretary 



OF INTEREST TO TEACHERS* 

 General Science Courses 



Among other views on general biology W. L. Eikenberry's 

 article {School Science and Mathematics, September, 19 10) men- 

 tions two facts that are not always recognized in framing such 

 general courses. The first is related to the three part courses 

 now popular as a first year course. 



"The present tendency toward the use of 'immediately useful' 

 or economic materials has stimulated the attempt to organize 



* Conducted by Miss Jean Broadhurst, Teachers College, Columbia University.. 



