NOVEMBEB 30, 1906.] 



SCIENCE. 



689 



laboratory, Massachusetts General Hospital (in- 

 troduced by W. T. Councilman) : Demonstration 

 of the histogenesis of the blood plates. 



F. B. Maxlory, associate professor of path- 

 ology. Harvard University (introduced by W. T. 

 Councilman) : Demonstration of intracellular sub- 

 stances, and differential methods of staining. 



E. E. Southard, assistant professor of neuro- 

 pathology, Harvard University (introduced by W. 

 T. Coimcilman) : Demonstration of nerve cells and 

 neuroglia. 



S. B. WoLBACH, instructor in pathology. Har- 

 vard University (introduced by W. T. Council- 

 man) : Demonstration of two pathogenic fungi re- 

 lated to genus Oidium exhibiting changes in mor- 

 phology and protective phenomena when inocu- 

 lated into animals. 



W. T. Porter, professor of comparative physi- 

 ology. Harvard Medical School (introduced by H. 

 P. Bowditch) : Improved kymographions. 



M. L. Fernald, assistant professor of botany, 

 Harvard University (introduced by G. L. 

 Goodale) : Certain plants in eastern Canada. 



E. C. Jeffrey, assistant professor of vegetable 

 histology, Harvard University (introduced by G. 

 L. Goodale) : Photographic and photomicrographic 

 illustrations of Cretaceous plants. 



Oakes Ames, assistant director of the botanic 

 garden, Cambridge (introduced by G. L. Goodale) : 

 New orchids from the Philippines. 



G. L. Goodale, professor of botany, Harvard 

 University : A new form of ' container ' for mu- 

 seums of botany, plaster-plaques for museums, 

 selections from recent photomicrographs of fibers. 



E. E. Tyzzer, director of cancer research labora- 

 tory. Harvard University (introduced by W. T. 

 Councilman) : Photomicrographs illustrating the 

 dermatitis produced by the Brown Tail moth. 



W. B. Cannon, professor of physiology. Har- 

 vard University (introduced by H. P. Bowditch) : 

 Movements of the stomach and intestine as seen 

 in the zoetrope. 



Arthur Gordon Webster, professor of physics, 

 Clark University: A set of instruments for the 

 performances of quantitative researches in acous' 

 tics. 



J. C. Branner, professor of geology, Stanford 

 University: Album of photographs relating to 

 the geology of the California earthquake of April 

 18, 1906. 



Theodore Lyman, instructor in physics, Har- 

 vard University (introduced by John Trow- 

 l)ridge) : Photographs of short wave-lengths. 



George C. Comstock, director of the Wash- 



burn Observatory: Pendulum apparatus for the 

 determination of the force of gravity. 



W. B. Scott, professor of geology, Princeton 

 University: Drawings and plates of fossil mam- 

 mals, etc., for the reports of the Princeton Uni- 

 versity expeditions to Patagonia. Also published 

 parts of reports. 



Bailey Willis, Geologist, U. S. Geological 

 Survey (introduced by Chas. D. Walcott) : Geo- 

 logical map of North America, prepared for the 

 International Geological Congress at the City of 

 Mexico. 



Charles S. Mendenhall, professor of physics, 

 University of Wisconsin (introduced by George 

 C. Comstock) : New apparatus for pendulum de- 

 terminations of gravity. 



Louis Kahlenberg, professor of chemistry. 

 University of Wisconsin (introduced by Charles 

 R. Van Hise) : Apparatus for the investigation 

 of osmotic pressures. 



Charles F. Burgess, professor of applied elec- 

 tro-chemistry, University of Wisconsin (intro- 

 duced by George C. Comstock) : Exhibits in ap- 

 plied electro-chemistry. 



E. L. Mark, Hersey professor of anatomy, Har- 

 vard University: A machine for cutting wax re- 

 construction plates by means of an electrical de- 

 vice; a paraffine bath heated by electricity. 



G. H. Parker, professor of zoology. Harvard 

 University (introduced by E. L. Mark) : Mis- 

 tichthys luzonensis, the smallest vertebrate. 



W. E. Castle, assistant professor of zoology. 

 Harvard University (introduced by E. L. Mark) : 

 Wild and tame guinea-pigs and hybrids between 

 the two. 



Robert T. Jackson, assistant professor of 

 paleontology. Harvard University (introduced by 

 E. L. Mark) : Binocular preparative microscope. 



J. E. Wolff, and C. Palache, professor. Har- 

 vard University (introduced by W. M. Davis) : 

 Examples of recent instruments, models, etc., for 

 the study and exposition of mineralogy, petro- 

 graphy, and optical mineralogy. 



A. G. Webster, Clark University, Worcester: 

 Dynamical tops. 



George E. Hale, director of the solar observa- 

 tory of the Carnegie Institution: Photographs 

 and drawings from the solar observatory. 



C. Barus, Brown University, Providence: 

 Charts of the distribution of atmospheric nuclea- 

 tion in the lapse of time. 



From four to five o'clock an exhibit of lan- 

 tern slides was made in the lecture room 

 on the first floor, by Professors S. I. Bailey, 



