66 



The origin, chemistry, and uses of tannin have been studied 

 very extensively, but other phases of the subject have received 

 comparatively little attention. This is especially true concerning 

 the functions which it serves in the plant. It is usually very 

 abundant in diseased tissues, such as insect galls, fungus galls, 

 fungus spots, etc. In insect galls it is developed very early and 

 in some cases it appears to result in the gall-makers moving to 

 other parts of the plant. It is also formed in fungus galls, fre- 

 quently surrounding the point of rupture. In such fungus spots 

 as those produced by Ccrcuspora the successive circles are due to 

 the depositing of the tannin within the tissues. The speaker has 

 made extensive studies on the anatomy of both insect and fungus 

 galls and is now conducting a series of physiological experiments. 



C. Stuart Gager, 



Secretary. 



Feburary 12, 1907 



The Club was called to order at the American Museum of 

 Natural History, with President Rusby in the chair. Ten persons 

 were present. 



The reading and approval of the minutes of the meeting of Janu- 

 ary 30, 1907, was followed by the presentation of the name of Mrs. 

 J. S. Ehrich, i West 72d St., New York City, for membership. 



The president appointed the following committees for the cur- 

 rent year : 



Finance. — Judge Brown and Professor Richards. 



Admissions. — Professor Burgess, Dr. Small, Dr. Curtis. 



Local Flora. — (Phanerogams), Dr. Britton, Mr. Bicknell, 

 Miss Mulford, Mr. Eggleston, Mr. Schneider; (Cryptogams), 

 Professor Underwood, Dr. Howe, Dr. Murrill, Mrs. Britton, Mr. 

 Williams. 



Program. — Dr. Howe, Professor Underwood, Mrs. Britton. 



Field Meetings. — Mr. Wilson, Mr. Nash, Mr. Vreeland. 



Referring to the subject of the work of the committee on the 

 local flora, the need of more active work was urged. To this 

 end, a motion was made and seconded that the committee be em- 

 powered to appoint additional members to facilitate additional 



