Ixxii Trans. Acad, Sci. of St. Louis. 



Dr. C. R. Keyes presented in abstract papers on the rela- 

 tions of the Devonian and Carboniferous systems of the 

 Upper Mississippi basin, and on the distribution of Missouri 

 coals. 



The President announced the death of Dr. J. M. Leete^ 

 and, on motion, a committee composed of Dr. Grindon, Mr. 

 Harrison and Professor Nipher was appointed to prepare 

 suitable resolutions for presentation at the next meeting of the 

 Academy. 



May 3, 1897. 



President Gray in the chair, twenty persons present. 



Mr. H. von Schrenk spoke of the respiration of plants, with 

 special reference to the modification of those growing with 

 their roots submerged in water. The lecture was illustrated 

 by a demonstration of the liberation of carbon dioxide in 

 respiration, from the roots of an ordinary flowering plant 

 and from freshly gathered fungi, and the more usual 

 aerenchyma structures were made clear by the use of lantern 

 slides. 



Professor F. E. Nipher described a simple means of measur- 

 ing the resistance of a tube to a current of air, when compared 

 with an accepted standard, by the use of a device similar in 

 principle to the Wheatstone bridge used in electrical instru- 

 ments. The apparatus, in the present instance, consisted of 

 parallel tubes filled with air, connected by a tubular bridge, 

 in the middle of which a drop of water was placed, so as to- 

 change position with the variations in the pressure of air on 

 the opposite sides of the drop. 



Mat 17, 1897. 



President Gray in the chair, twenty- five persons present. 

 The committee appointed at the meeting of April 19 pre- 

 sented the following memorial of the late Dr. J. M. Leete. 



The St. Louis Academy of Science Is once more called upon to record the 

 death of one of its valued members. Dr. James M. Leete was born in Lock- 

 port, New Yorkjin the year 1832. At the close of his early studies, he removed 

 to Hines County, Mississippi, where he taught school for some time, thua 



