﻿of grcat stress , not only in one direction, but with unequal 

 stresses in different directions, and under wide ranges of tempe- 

 rature, moisture and other conditions. 



8. Determinations of the relations of pressure to tlie mel- 

 ting point wliilc under differential stress and other variable con- 

 ditions, including variable amounts of water, vapors and gascs. 



9. Determinations of the eonductivity of rocks and the 

 lavvs of Variation of such eonductivity under varying conditions 

 of heat and pressure. 



10. Determinations of the elasticity of rocks and the laws 

 of Variation of elasticity under varying conditions of heat, pres- 

 sure, change of State and change of substance, involving also 

 experiments on the compressibility of rocks. 



11. Experiments and mathematical investigations to detcr- 

 mine the nature and quantitative value of the possible sources 

 of internal heat under multiple hypotheses as to the original 

 states of the earth. 



12. Determinations of the original distribution of heat under 

 such hypotheses, of the secular loss, of the secular generation 

 of heat by gravitative condensation , of the redistribution of 

 internal heat and its possible relations to deformation and 

 vulcanism. 



13. Tidal deformation by observational determinations in 

 laboratory and field. 



14. Mathematico-physical reinvestigations of the moon-earth 

 tidal relationship, and its bearings on the past and prospective 

 history of the earth, wrought out under multiple hypotheses co- 

 vering the füll limits of the probabilities of the case. 



15. Tests of the distribution of the internal densities, or 

 massdistribution of the earth by astronomic data. 



16. Gravimetrie measures at specially selected significant 

 points embracing (1) such points as will best determine the dis- 

 tribution of gravity upon the ocean areas as distinguished from 

 the continental, and on the border ground between these, and 

 (2) at such points as show notable variations of increase of 

 internal temperature in depth (independent of obvious recent vol- 

 canic action) to determine whether the observable variations are 

 dependent on variations of density, and so possibly are dependent 

 on compression. 



Das genannte Komitee würde es mit Dank begrüßen, wenn 

 ihm aus dem Kreise der deutsehen geologischen Gesellschaft für 

 einen zweiten Bericht, den er an den Verwaltungsrat des Carnegie 

 Institution einreichen soll, weiteres Material zu geologischen Pro- 

 blemen und Vorschläge zu ihrer Inangriffnahme zugestellt würden. 



