14 



24- A Study of the Microscopical Organisms of the Croton 

 Water Supply. Exhibited by Karl M. Vogel, Ph.G., 

 and Smith Ely Jelliffe, M.D. 



25. Specimens illustrating various forms of Exobosidium Vac- 



cina (Fuckel) Worom'n, as it appears on different hosts 

 and at different times of the year. Exhibited by Dr. 

 Herbert M. Richards. 



26. Illustrations of Alabama Fungi. 



a. PeridertJiium cerebj'um Feck ; a parasitic fungus affect- 

 ing the pine'and causing the death of many young trees 

 in various parts of the Southern States. 



b. New and interesting species of Polyporus. 



These specimens are in boxes designed to be used for 

 the preservation of bulky specimens, such as cones and 

 other large dry fruits, woody fungi and the like ; the 

 boxes are in multiple sizes and are designed to fit into a 

 tray or drawer the size of the standard herbarium sheet. 



27. Polyporus officinalis^ a rare fungus recently collected in 



Wyoming, said to be used as a substitute for quinine in 

 certain portions of the country. The specimen is about 

 one-third of the entire plant. 



Nos. 26 and 27 exhibited by L. M. Underwood. 



28. Diagrams illustrating the effect of wounding on the respira- 



tory activity and temperature of various plant parts, to- 

 gether with drawings of some of the apparatus employed 

 in investigating the same. Exhibited by Dr. Herbert M. 

 Richards. 



29. Demonstration of the Transpiration Current in the 



Stems of Plants. The water absorbed by the roots 

 passes through the stem and is exhaled in large part by 

 the leaves. In this demonstration a plant freed of its 

 roots is connected with a tube filled with water. This 

 tube passes imder the microscope and the observer sees 

 the water current on its way to the stem and leaves. 

 The microscope, of course, appears to reverse the direc- 

 tion of the current. 



