1889.] 



BOTANICAL' GAZETTE. 



26l 



of the plant. The points of attack are easily visible in the 

 early stages of the disease, as transparent spots when viewed 

 by strong transmitted light. A Micrococcus, pure cultures 

 of which were shown, has been demonstrated to be the cause 

 of the disease, bv direct artificial infection. 



Grasses of Roane Mountain, by F. Lamson Scribner. 

 Published in full in another part of this journal. 



Revision of the United States species of Fuirena, by Fred. 



V. COVILLE. 



Three species are admitted: F. scirpoidea Michx., sim- 

 plex Vahl, and squarrosa Michx., and vars. hispida Chapm. 

 and pumila Torr. of the last species. These can be distin- 

 guished by the perianth scales and bristles. 



A bacterial disease of Indian corn, by T.J. Burrill. 



Has been known some time, but its nature not recognized 

 until recently. The plants have a yellowish and dwarfed 

 appearance, "with exudation near the ground. The bacteria 



have been cultivated. 



JVuitallii 



Day. 



The first flower is apical and contains five nutlets instead 

 of the usual four. This appears to be a step toward the pe- 

 loric condition. 



Fermentation of ensilage, by T. J. Burrill. 



The temperature usually rises during the fermentation of 

 ensilage to a point (6o° C.) that stops most if not all growth 

 except that of a single species of bacteria. As the tempera- 

 ture falls secondary changes occur, especially the formation 

 of lactic and acetic acids. 



Modern teaching appliances in biology, by R. R. Wright. 



Professor Wright took this occasion to show and explain 

 the various rooms and fittings of the new and handsome bio- 

 logical 



held. 



building in which the meetings ot the section were 

 All the appointments show much thought, and wise 

 and liberal expenditure. Among the botanical appliance.- 

 were Brendel and Auzoux models, Kny and Dodel-1 ort 

 charts, Noll's growth apparatus, and three patterns ot L,eitz 

 microscopes. In the upper story were conservatories and 

 tanks for water plants built of granilitic cement. 



On a convenient method of subjecting living cells to coloring 

 agents, by George L. Goodalk. 



Read by title. , , ,- ., „ 



The following paleobotanic paper was read before the 



Geological Section : ,, r • M 



On certain remarkable new fossil plants from the hnan 



