MI.Nl'TKS OI' SECTION A, 1 69 



covered with honey dew. C. M. Broomall exhibited calcite 

 showing interference colors. T. Chalkley Palmer exhibited 

 diatoms from Swan Lake, Oregon, which he had received 

 from William A. Terry, of Bristol, Connecticut. Carlota 

 Broomall exhibited specimens of the " sea horse." T. Chalk- 

 ley Palmer announced the discovery of a new species of 

 diatom, for which the name Navictila socialis had been pro- 

 posed. Specimens of this diatom were shown under the 

 microscope. It resembles Navicjila viridis, but differs from 

 the latter in that it occurs in groups of four individuals. Dr. 

 B. M. Underbill exhibited a biting fly, which is very trouble- 

 some to horses : also Musca vomitoria, and in connection with 

 this exhibit he gave a talk, with charts, etc., on the life his- 

 tory of this insect ; he also exhibited the larva of Corydalis 

 cormita. William B. Broomall, Jr., exhibited the larva of a 

 " lad)'- bug." Sanfojd Omensetter presented a collection of 

 Monotropa imiflora. Albert S. Barker exhibited under the 

 microscope living specimens of Conchilos volvox, Cyclops, 

 Cypris and D aphid a. 



July 8, 1909. — C. Edgar Ogden spoke on " honey dew." 

 This was found usually on the Norway maple, but had been 

 seen also on the white oak. Carlota Broomall exhibited a 

 specimen of agate. Carolus M. Broomall presented a yellow 

 billed cuckoo, found dead on the porch of his residence, but 

 showing no evidence of injury ; also a number of specimens 

 collected by E. \'. Streeper, Jr., at Atlantic City, including 

 periwinkle eggs, a fiddler crab, a hermit crab, a medusa and 

 the inside shell of a squid. Dr. B. M. Underhill exhibited a 

 J-'iirus gathered at Longport ; also a Tabanus atrahis. San- 

 ford Omensetter presented Orthosoma brunnea. Carolus ^T. 

 Broomall described certain experiments with polarized beams 

 from rainbows and moonlight. 



Ji'LV 15, 1909. — Albert S. Barker described the resolutions 

 of vibrations in ]ilane polarized light, and with a table poian- 



