92 Transactions Tennessee Academy of Science 



are reviewed and attention called to the most probable explanation. 

 November 26, 1915. 



NATURE AND ORIGIN OF THE HOLSTON MARBLE FORMA- 

 TION IN EAST TENNESSEE. 



BY C. H. GORDON, UNIVERSITY OF TENNESSEE. 



(Abstract.) 



In this paper evidence is presented to show that the materials 

 making up this formation were accumulated in shallow water and 

 that it corresponds in many respects to formations considered to be 

 of reef origin. While the organic nature of the deposit is unques- 

 tionable, corals are rare. The remains of bryozoans and other or- 

 ganisms, however, are abundant, from which fact the conclusion is 

 drawn that the reefs were of the nature of bryozoan reefs rather than 

 coral reefs. 



November 26, 1915. 



WEST INDIAN HURRICANES; THEIR ORIGIN, IVIOVEMENT, 



AND EXTENT. 



BY ROSCOE NUNN, U. S. WEATHER BUREAU. 



(Abstract.) 

 The frequency and violence of the hurricanes that visited the 

 Southern States in the summer of 1916 are mentioned, and their 

 unusual features noted. Origin of the name "hurricane". Differing 

 characteristics of the storms of middle latitudes and the hurricanes 

 of the tropics. Characteristics of tornadoes distinguished from 

 those of hurricanes. Development of knowledge concerning hurri- 

 canes. The several theories to account for the origin of storms. 

 The convectional theory of the origin of hurricanes. Reference to 

 the work of Prof. William Ferrel and "Ferrel's Law". Geograph- 

 ical and seasonal distribution of hurricanes. Paths of hurricanes 

 and their rate of progress. Illustrated (by means of the refle^Ho- 



