Ixxiv Trans. Acad. Sci. of St. Louis. 



of foliage. While the edge of dry leaves presented to the 

 wind offers little resistance, when foliage is wet and massed 

 this may be very different. Local variations in these several 

 factors make a comparison of different species diflScult. It 

 was shown that Acer dasycarpum was badly broken on account 

 of its brittle wood and heavy foliage, while the weak-wooded 

 Tilia and Liriodendron were also broken. Spreading- 

 topped trees, like Ulmus Americana^ as a rule, were broken 

 and uprooted, though the branches were only bent in the 

 tougher-wooded individuals. As a general thing, conical 

 trees, like Ulmus campestris^ Liquidambar and most conifers, 

 and the strong-wooded oaks, were little injured. Taxodium 

 distichum^ from its slender form, strength and elasticity, was 

 injured least of all. It was shown that after the tornado, 

 which occurred early in the vegetative period, most of the 

 trees continued the summer's growth by producing new 

 foliage shoots. While a few died from the inability to secure 

 food, others indicate injury by flowering and fruiting more 

 profusely than usual. It was shown that some of the trees 

 which were broken have already begun to show serious decay 

 where the branches were removed, so that the final injury can 

 hardly yet be measured. The results observed here were 

 compared by the speaker with those which have been reported 

 from time to time in connection with severe storms elsewhere. 



In the discussion of Mr. Norton's paper, Mr. von Schrenk 

 submitted some interesting specimens, slides and drawings 

 illustrating the formation of a double ring of wood in 1896, 

 resulting from the refoliation of the branches, denuded shortly 

 after the season's growth had begun. 



The Secretary presented a paper by Frank C. Baker, en- 

 titled Critical notes on the family Muricidae. 



June 7, 1897. 



President Gray in the chair, twenty persons present. 



A paper by Robert Combs, entitled Plants collected in the 

 District of Cienfuegos, Province of Santa Clara, Cuba, in 

 1895-1896, was presented, and the introduction was read by 

 Mr. W. H. Rush. 



