1892.] Proceedings of Scientific Societies. 



removing the paper, the celloidin block is transferrer 

 for twenty-four hours, then to carbolic acid 1 or gly< 

 becomes as transparent as glass 2 . The block is fh 

 manner. 



Orientation is now accomplished with the greatest ens 

 knife is wet with the clearing medium given above. 

 be arranged in serial order on the knife-blade urn 

 obtained, when they are transferred, balsam and ooi 

 this method long series may be readily bandied ( Hy< 



PROCEEDINGS OF SCIENTIFIC SOCIETIES. 



Boston Society of Natural History.— April 6th.— The fol- 

 lowing papers were read: Percival Lowell, Shinto Occultism, God- 

 possession of the People ; Harold C. Ernst, Some of the Advances in 

 Bacteriology. — Samuel Henshaw, Secretary pro tempore. 



The Biological Society of Washington.— March 19th.— The 

 er of the evening was The Biological Basis of Psychol- 

 ogy, by Prof. Lester F. AVard. The following communications were 

 read: C. D. Walcott, On the Discovery of Certain Cambrian Fossils 

 on the Coast of Massachusetts ; F. H. Knowlton, The Fossil Flora of 

 the Bozeman Coal Field; C. W. Stiles, Notes .on Parasites. Strongylus 

 . rubidus Hassall and Stiles, '92. 



April 2d. — The principal paper of the evening was The Interdepend- 

 ence of Plants and Insects, by Prof. C. V. Riley, illustrated by lantern 

 slides. The following communications were made : C. Hart Merriam, 

 The Distribution of Tree Yuccas, illustrated ; H. E. Van Deman, 

 Variations in the Fruit of Hicoria Pecan; C. W. Stiles, Notes on 

 Parasites ; Two Stages in the Life History of Distoma magnum Bam 

 1875. (D. americana Hassall 1891.)— Frederic A. Lu< AS, Seer* 





