24 THE PLANT WORLD. 



T."]. Fecundation and triple fusion in the endosperm nucleus of 

 Liliuin Caroliiiiaiiuin. Exhibited by Carlton C. Curtis. 



28. (a) Exhibition of laboratory papers in plant physiology. 



(b) Contributions from the Botanical Department. Exhib- 

 ited by Department of Botany, Columbia University. 



29. (a) Pleistocene plants. Coastal plains of North Carolina. 

 (b) Leaf variation in Coiiiptouia peregrina. (L) Coulter. 



Exhibited by E. W. Berry. 



30. Photographs of Colorado plants. Exhibited by Francis 



Ramaley. 



31. (a) Lieber's radium-coated rods used to expose plants to the 



rays of radium. 



(b) Radioactive microscopic slide devised by C. Stuart Gager 



and prepared by H. Lieber & Co., New York, for ob- 

 serving the effects of radium rays on cell activities. 



(c) Radium preparations used for exposing plants to the 

 ; rays of radium. Exhibited by C. Stuart Gager, by 



courtesy of H. Lieber & Co., New York. 



32. Publications of the Torrey Botanical Club. 



2^. Species and illustrations of fungi, by George F. Atkinson. 

 By courtesy of Henry Holt & Co. 



34. Principles of botany, by Bergen & Davis. By courtesy of 



Ginn & Co. 



35. The " Flora of Colorado," together with illustrative speci- 



mens. Exhibited by Axel Rydberg. 

 T,6. Cross-section of Schlothciuiia jaiiiaicciisc. E. G. Britton, 

 n. sp. Exhibited by Alexandrina Taylor from specimens 

 belonging to the New York Botanical Garden. 



37. Specimen and drawing of Andrecca Toccooc. J. T. Emerson, 



n. sp. Exhibited by Julia T. Emerson from specimens 

 belonging to the New York Botanical Garden. 



38. Photographs, publications and specimens illustrating the 



work of the Department of Botany, L^niversity of Mis- 

 souri. Exhibited by Benjamin W. Duggar. 



39. Photographs of vegetation. Exhibited by Charles E. Bessey. 



40. Recent issues of the Pl.^nt World. Exhibited bv Editor. 



