x Proceedings. 



Dr. Erwin F. Smith considered PEACH YELLOWS AND PLANT 

 NUTRITION.* 



Two HUNDRED AND TWELFTH MEETING, 

 May 6, 1893. 



The President in the chair, and nine persons present. 



L. H. Dewey presented a paper entitled GEOGRAPHIC DIS- 

 TRIBUTION OF GRASSES IN THE UNITED STATES. Mr. 

 Dewey 's article was discussed by Messrs. Coville and 

 Palmer. 



Dr. Erwin F. Smith spoke ON THE SYMBIOSIS OF STOCK 

 AND GRAFT. Further remarks upon the same subject were 

 made by Messrs. Coville, Riley, and the original speaker. 



Dr. Theobald Smith described A NEW SPOROZOON IN THE 

 INTESTINAL VILLI OF THE Ox.f 



The Communication was discussed by Messrs. E. F. 

 Smith, Riley, and Theobald Smith. 



Two HUNDRED AND THIRTEENTH MEETING, 

 May 20, 1893. 



The President in the chair, and twenty-eight persons 

 present. 



Mr. Charles Schuchort was elected an active member. 



The following communications were presented. 



Dr. V. A. Moore read on THE DISTRIBUTION OF PATHOGENIC 

 BACTERIA IN THE UPPER AIR PASSAGES OF DOMESTICATED 

 ANIMALS. ;j: 



^Experiments with Fertilizers for the Prevention and Cure of Peach 

 Yellows, 1889-92. <Bull. Div. Veg. Path., No. 4, U. S. Dept. Agric., 197, 

 p. 33, pi.,; 1893. 



t Preliminary Notes on a Sp< >rozoon in the Intestinal Villi of Cattle. <Bull. 

 Bur. An. Indust,, No. 3 (U. S. Dept. Agric.) pp. 73-78, pi. i, 1893. 



^Pathogenic and Toxk-opfonic Bacteria in the Upper Air Passages of 

 Domesticated Animals. <Bul. Bur. An. Ind., No. 3, (U. S. Dept. 

 Agric.) pp. 31-48, 1893. 



