1891. | REPORY OF GEOLOGICAL SECTION. 123 
December 19, 1890. Mr. Streeter showed the sieve tissue of 
Cucurbita pepo and also of Bryony ; prepared slides of annular, spiral, 
and reticulated vessels ; Gloeocapsa, showing cell division ; Spirogyra 
in conjugation ; Starch grains; Crystals from Onion; Aleurone from 
Ricinus communts and raphides. 
The circulation of protoplasm in Vadlisnerta sprralts was shown by 
Mr. Dumond. 
January 2, 1891. Mr. Streeter exhibited a number of pressed 
flowers from Alaska. Among them were species of Anemone, Straw- 
berry, Clematis, Geum and Larkspur. There was also a plant similar 
to our Dwarf Cornus. 
Miss Beckwith showed a Shepherdia argentea from Big Horn City, 
Wyoming. She also reported finding in blossom at this date Dande- 
lion, Capsella, Chickweed, and. Senecio vulgarts. 
The microscopical studies were leaf of Marcissus, scale and bud 
of Shepherdia, growing point of Indian Corn and a section of squash 
showing spital and ringed vessels. 
REPORT OF THE SECTION OF GEOLOGY. 
(Zn abstract.) 
Read by H. L. Preston, Recorder of the Section. 
During the past year the Geological Section has held sixteen meet- 
ings, with an average attendance of ten persons, the smallest number 
present at any meeting being seven, the largest seventeen. 
The plan of work and the character of the meetings have been the 
same as last year. The meetings were held on Tuesday evenings, twice 
a month, in the Section Room of the Academy, on the second floor of 
Anderson Hall, University of Rochester. 
The Section has received during the year eleven new members, 
making a total of twenty seven names now on the roll. 
Extracts from the Minutes of the Section. 
Jan. 20, 1890. Mr. Walker presented to the Section a fine speci- 
men of Labradorite taken from a large boulder near No. 19 School 
building. Mr. H. L. Preston read a paper upon agates and water- 
stones from Uruguay. 
The topic of the evening was, The Chemical Agencies of 
Water. Mr. E. E. Howell spoke of the necessity of keeping the native 
iron trom Greenland exposed to the open air, in order to keep it frum 
