Pennsylvania for Sessions igoi-igoj. Ixxiii 



Mr. Greensmith then exhibited Adonis vernalis, Pri- 

 mula denticulata and a curiously purple-blue colored prim- 

 rose. He also gave a highly interesting description of 

 methods he had adopted for extensive propagation of her- 

 baceous plants by root and subterranean shoot cuttings and 

 illustrated with numerous specimens. 



April s. Dr. Miller, President, in the chair. Mr. S. L. 

 Shumo described a recent journey made to the islands of 

 Martinique and St. Vincent. He especially dwelt on the 

 destruction of the vegetation by tlie earthquakes in the 

 former island, and illustrated by a series of striking lantern 

 shdes. 



Dr. G. P. Goode spoke on "Lichens as Cave Formers." 

 He showed how these plants in many cases, and specially 

 when growing on soft rock, gradually wasted the rock sur- 

 face. Rain currents then washed away the loosened mate- 

 rial, and cave-like excavations, between harder rock-masses 

 above and below, gradually originated. 



Miss Edith Farr, Chairman of the Phanerogamic Com- 

 mittee, reported on the Committee's activities and made 

 valuable suggestions for the work of the coming summer. 



Miss Marion Mackenzie supplemented her observations 

 of the previous meeting by showing that vegetation was still 

 advancing with marvelous rapidity, so that the season was 

 an unexampled one for early unfolding of flower and leaves. 



April ij. Dr. Miller, President, in the chair. Miss 

 Mira Dock spoke on "Tree Growth and Forest Reservations 

 in the State of Pennsylvania." She stated that owing to the 

 varied and wise action already taken, the State was leading 

 all others in securing large areas in different localities. By 

 aid of a map she showed the location and comparative size 

 of these, and their relation to the head waters of our more 

 important streams. In all cases the land had been secured 

 at a low rate, and would soon be planted with suitable 

 growths of trees, where these did not already exist. To aid 

 in this, nurseries of young evergreen trees had been estab- 



