THE 



Ohio Journal of Science 



PUBLISHED BY THE 



Ohio State University Scientific Society 

 Volume XVI FEBRUARY, 1916 No. 4 



TABLE OF CONTENTS 



Sheard and Morris — The Spectra of Some Halogen Compounds and Phe- 

 nomena Connected Therewith 113 



Krecker — Sunfish Nests of Reimiller's Cove 125 



BoHANNAN — Hexagon Notation 135 



IvAMB — Outliers of the Maxville Limestone in Ohio North of the Licking River 151 

 Napper— Occurrence of Carbonaceous Material in the Greenfield Member of 



the Monroe Formation. 155 



THE SPECTRA OF SOME HALOGEN COMPOUNDS AND 

 PHENOMENA CONNECTED THEREWITH.* 



Charles Sheard and C. S. Morris. 



A careful search of the literature on the spectra of com- 

 pounds reveals but few papers of any importance. The first 

 of these is by B. O. Peirce on the "Emission Spectra of Halogen 

 Compounds of Mercury" in the Annalen der Physik, N. F. 

 Vol. 6, 1879. His investigations were carried out using Geissler 

 tubes excited by an induction coil; the tubes with the con- 

 tained salt were heated by a Bunsen burner. With mercuric 

 and mercurous chlorides he found a band lying between the 

 yellow and the green mercury lines and observed that in the 

 green region the continuous spectrum was filled with many 

 fine, weak lines. The conclusion is drawn that the emission 

 spectra of the two chlorides of mercury under heat are the 

 same, due to the fact that the mercurous chloride dissociates 

 into mercuric chloride and chlorine and the continuous spectrum 

 is therefore due in both cases to the mercuric chloride. The 

 iodide, bromide and chloride compounds of mercury gave 

 continuous bands with their middle points at about 4430, 

 5000 and 5800 Angstroms respectively. 



*Read before the American Physical Society, December, 1915. 



113 



