© Fes.1g01. OBSERVATIONS ON INDIANA CAVES—F ARRINGTON, 261 
» progressive molecular arrangement. The carbonate of lime was 
deposited first in narrow, concentric bands. The substance then 
“rearranged itself in. the form of more or less continuous fibres 
arranged at right angles to the planes of deposition. Then with the 
: lapse of time and pressure a second rearrangement was made by 
which the attractive forces brought the molecules together grouped 
-along rhombohedral planes. 

Fic. 6—Broken end of stalagmite, showing change from fibrous to rhombohedral structure. 
RATE OF GROWTH OF STAGMALITES.—I propose this word, com- 
_ pounded from raya (drop) and Azos (stone), as a general name for 
formations produced by dropping water. 
: Under the present usage the expression stalactites and stalag- 
mites, each term of which has a limited meaning, is the only one 
available. So many stagmalites in this cave are in process of forma- 
tion that it seems a favorable place for a study of their rate of growth 
and of the variations which occur in this rate. Inthe hope of obtain- 
