January 10, 1919] 



SCIENCE 



47 



Laboratories, Harvard University. A mor- 

 phological study for the purpose of determin- 

 ing- the merits of various contending views. 



Studies of Magnitudes in Star Clusters, 

 VIII. A Summary of Results Bearing on the 

 Structure of the Sidereal Universe: Harlow 

 Shapley, Mount Wilson Solar Observatory, 

 Carnegie Institution of Washington. A sum- 

 mary of results leads to a simple interpreta- 

 tion of star-streaming. The stars of Stream 

 I. belong to the large moving cluster surround- 

 ing the Sim, those of Stream II. belong to the 

 galactic field. 



Glacial Depression and Post-Glacial Uplift 

 of Northeastern America: H. L. Fairchild, De- 

 partment of Geology, University of Rochester. 

 An illustration of the geophysical theory of 

 isostacy. 



A Bacteriological Study of the Soil of Log- 

 gerhead Key, Tortugas, Florida: C. B. Lipman 

 and D. D. Waynick, College of Agriculture, 

 University of California. A discussion of 

 bacterial counts, nitrogen transforming pow- 

 ers of the soils, and nitrogen fixing powers 

 and organisms. 



Autonomous Responses of the Lahial Palps 

 of Anodonta: P. H. Cobb, Zoological Labora- 

 tory, Harvard University. The palp contains 

 within itself the neuro-muscular organism 

 necessary for the responses described, and 

 therefore possesses an autonomy more com- 

 plete than that of the vertebrate heart. 



The Depth of the Effective Plane in X-Ray 

 Crystal Penetration : F. C. Blake, Department 

 of Physics, Ohio State University. In de- 

 termining the value of h by means of X-rays, 

 the "depth of the effective plane" was 0.203 

 mm. for calcite with a certain X-ray wave 

 length. An attempt is here made to explain 

 this theoretically. 



The Myodome and Trigemino-Facialis Cham- 

 ier of Fishes and the Corresponding Cavities 

 in Higher Vertehrates: Edward Phelps Allis, 

 Jr., Palais Carnoles, Menton, France. 



The Effect of Inbreeding and Crossbreeding 

 upon Development: D. F. Jones, Connecticut 

 Agricultural Experiment station. New Haven. 

 A continuation of work by East and Hayes on 



the naturally cross-pollinated com plant, Zea 

 mays L. 



National Research Council: Executive Order 

 Issued by the President of the United States 

 May 11, 1918 ; Minutes of the Second Meeting 

 of tlie Executive Board of the War Organiza- 

 tion in Joint Session with the Council of the 

 National Academy of Sciences; Minutes of 

 Third Meeting of Executive Board of War 

 Organization. 



Report of the Annual Meeting of the Acad- 

 emy : Award of Medals ; Research Grants from 

 Trust Funds of the Academy. 



The ninth number of Volimie 4 contains 

 the following articles : Metalliferous Laterite in 

 Neiv Caledonia: W. M. Davis, Department of 

 Geology and Geography, Harvard University. 

 Laterite ores of the serpentine highlands seem 

 to be local as to area of development and in- 

 termittent as to time or origin and duration 

 of occurrence. 



A Comparison of Growth Changes in the 

 Nervous System of the Rat with Correspond- 

 ing Changes in the Nervous System of Man: 

 Henry H. Donaldson, Wistar Institute of 

 Anatomy and Biology, Philadelphia. The five 

 events in the growth of the nervous system of 

 the rat, namely, (1) increase in total weight, 

 (2) decrease in percentage of water, (3) ac- 

 cumulation of myelin, (4) maturing of the 

 cerebellum, (5) attainment of mature thick- 

 ness of the cerebral cortex, all take place at 

 ages equivalent, or nearly equivalent to those 

 at which they occur in man; and hence, by 

 the use of equivalent ages there is a satis- 

 factory method for making a cross reference 

 between the rat and man. 



Variation and Heredity During the Vegeta- 

 tive Reproduction of Arcella Dentata: R. W. 

 Hegner, Zoological Laboratorj', Johns Hop- 

 kins University. Within a large family of 

 Arcella dentata produced by vegetative re- 

 production from a single specimen, there are 

 many heritably diverse branches. These di- 

 versities are due both to very slight variations 

 and to sudden large variations or mutations. 

 The formation of such hereditarily diverse 

 branches seems to be a true case of evolution 



