August 30, 1907] 



SCIENCE 



279 



have been included among the sciences, 

 when the work of the candidates was sup- 

 posed to be inductive or statistical in char- 

 acter. But it is not possible, with the in- 

 formation at hand, to discriminate between 

 work that is scientific and work that is 

 historical or literary, and the degrees in 

 sociology and education have this year been 

 eliminated from the table. 



The institutions that conferred three de- 

 grees or more in special subjects are as 

 follows: Chicago, chemistry 5, zoology 3, 

 botany 4, mathematics 4, physiology 4; 

 Columbia, chemistry 5; Coniell, chemistry 

 4; Harvard, zoology 3, psychology 3; 

 Johns Hopkins, chemistry 11, physics 3; 

 Massachusetts Institute of Technology, 

 chemistry 3; Pennsylvania, physics 4; 

 Yale, chemistry 3. 



The names of those on whom the degree 

 was conferred in the natural and exact 

 sciences, with the subjects of their theses, 

 are as follows: 



UNIVEBSITY OF CHICAGO 



George David Birkhoff : " Asymptotic Properties 

 of Certain Ordinary Differential Equations with 

 Applications to Boundary Value and Expansion 

 Problems." 



William Richards Blair : " The Index of Re- 

 fraction of Water for Electric Waves by Inter- 

 -ference Methods." 



Roy Hutchison Brownlee: "On Precipitated 

 Sulphur." 



Stephen Reid Capps, Jr. : " The Pleistocene 

 <5€ology of the Leadville Quadrangle, Colorado." 



Charles MacDonald Carson : " A Study of the 

 Equilibrium Relations of S\ and Sii." 



Rollin Thomas Chamberlin : " The Gases oc- 

 cluded in Rocks." 



William Crocker : " The R51e of Seed in Delayed 

 Germination." 



Edna Daisy Day: "The Digestibility of Starch 

 as affected by Cooking." 



Emil Goettsch : " The Nature, Structure and 

 Distribution of the Oesophageal Glands of Mam- 

 mals." 



Lawrence Emery Gurney : " The Viscosity of 

 TVater at Low Rates of Shear." 



Charles Claude Guthrie : " The Relation of 

 Pressure in the Coronary Vessels to the Activity 

 of the Isolated Heart and Some Closely Related 

 Problems." 



Paul Gustav Heinemann : " The Kinds of Bac- 

 teria concerned in the Natural Souring of Milk." 



Willis Stose Hilpert : " The Stereoisomerism of 

 Nitrogen Compoimds: Stereoisomeric Chlorimido 

 Esters." 



Hemming Gerhard Jensen: "Toxic Limits and 

 Stimulation Effects of Some Salts and Poisons on 

 Wheat." 



James Wright Lawrie : " The Chemistry of the 

 Acetylidene Compounds." 



Hugh McGuigan : " Oxidations of Various Su- 

 gars in the Animal Body." 



Andrew Fridley McLeod : " On Aldol, Pentar- 

 rythrose and the Action of Copper Acetate on the 

 Hexoses." 



Arthur Ranum : " On a New Kind of Congru- 

 ence Groups." 



Oscar Riddle : " The Genesis of Fault-bars in 

 Feathers and the Cause of Alternation of Light 

 and Dark Fundamental Bars." 



Gustav Ferdinand Ruediger : " The Mechanism 

 of Streptococcus Immunity." 



Victor Ernest Shelford : " The Life-histories and 

 Larval Habits of the Tiger Beetles." 



Frances Grace Smith : " Morphology of the 

 Trunk and Development of the Mierosporangium 

 of Cyeads." 



John Sundwall : " The Structure of the Lacry- 

 mal Gland." 



Reinhardt Thiesseu : " The Vascular Anatomy 

 of the Seedling of Dioon." 



Charles Henry Turner : " The Homing of Ants : 

 An Experimental Study of Ant Behavior." 



Anthony Lispenard Underbill: "Invariants un- 

 der Point Transformations in the Calculus of 

 Variations." 



Buzz M. Walker: "On the Resolution of Higher 

 Singularities of Algebraic Curves into Ordinary 

 Double Points." 



Shigeo Yamanouchi: "A Study of Apogamy." 



JOHNS HOPKINS UNIVERSITY 



John August Anderson : " Absorption and Emis- 

 sion Spectra of Neodymium and Erbium Com- 

 pounds." 



Clyde Shepherd Atchison : " Curves with a Di- 

 rectrix." 



Frederick Conrad Blanck-: " The Nitration of 

 Aniline and Certain of its Derivatives." 



Taylor Scott Carter : " The Fluorescence, Ab- 



