﻿TABLE OF CONTENTS 



PACK 



1. A Note oil the Plianiiiicalogical Action of I raiiiiiiu. By Dennis 



E. Jackson and Fbank C. Mann 2 



Tlie effect of Starvation for Five Geiieraticns on tlie Sex-Iiatio of 



Drosophila Ampelopliila. By Claude DuVall Hotmes 10 



3. Studies on Perchloric Acid (I) : The Preparation of Perchloric 



Acid from Sodium Perclilorate. By Frantk C. Mathers S«) 



4. Studies on I'erchloric Acid (II) : Electrodeposition of Lead from 



Perchloric Baths. By Fraxk C. MATtiERS 30 



5. Studies on Perchloric Acid (III) : Mercurous Perchlorate Volta- 



meter. By Fraxk C. Mathers and A. F. O. Germanx 41 



(i. The Preparation of Ammoniuin-Selenate : A New Method. By 



Fraxk C. Mathers and Roy S. Bonsib oO 



7. A Continuous Function Haviiiir Xo^Yhere a DerlYatiYC. By Raix- 



AKD Benton Bobbins 59 



S. The Derivation of Poisson's Equation l»y Means of Gauss's The- 

 orem of the Arithmetic Mean. By Kexneth P. Williams... 64 



J). The Oolitic Limestone Industry in Indiana. By Oliver C. Lock- 



haet 71 



10. An Investigation of Housing and liiving Conditionsi in Three Dis- 

 tricts of Indianapolis. By L. M. Campbell Adams Ill 



IL An Example of Plagiarism Among Elizabethan Pamphleteers: 

 Samuel RoAvland's "Greenes Ghost Plaunting Coiiie-Catcliers." 

 By Edward D. McDonald 145 



12. Studies on Perchloric Acid (IT) : Distillation of Potassium with 



Sulphuric Acid. By Frank C. Mathers 173 



13. Qualitative Separation and Detection of Potassium and Sodium 



Avith Perchloric Acid and Ilydrofluosilicic Acid. By Frank 



C. Mathers and Ira E Lee ISO 



14. The Annual Parallax of Eight Stars. By William E. Howard... 183 



(3) 



