132 ROCHESTER ACADEMY OF SCIENCE. [Ap'l 25, May (>, 



the operator, that is to say, on his quickness of eye in following the 

 dance of the different colored grains and on his judgment as to the 

 proper height of the draw-tube and the proper time for drawing off 

 the sand accumulated in it. It will readily be seen that practice will 

 make a vast difference in these respects, so that with a little use, 

 results more perfect than those above recorded may be expected. 



The President read a paper entitled : 



A DESCRIPTION OF SOME PLANTS OF THE COAL ERA. 



The paper was illustrated by charts and fossils and was discussed 

 by Mr. Putnam, Dr. PVjshay and others. 



April 25, 1892. 



The President, Professor H. L. Fairchild, in the chair. 



A very large audience present. 



On motion all business was postponed. 



The fourth lecture of the Popular Lecture Course was given by 

 Dr. H. Carrixgton Bolton, of New York, entitled : 



FOUR WEEKS IN THE WILDERNESS OF SINAI. 



The lecture was illustrated by lantern views. 



May 9, 1892. 

 business meeting. 

 The President, Professor H. L. Fairchild, in the chair. 

 Thirty-three persons present. 

 The Council report recommended : 

 (i.) The election of the following persons as active members : 



Mr. E. R. Andrews, Mr. W. H. Gorsline, 



Mr. Marsenus H. Briggs, Mr. Montgomery E. Leary, 



Hon. Geo. F. Danforth, Mrs. Helen M. Miller, 



Mr. Wm. Eastwood, Mrs, Howard Osgood, 



