34 CARNEGIE INSTITUTION 



6. The determination of the heat of formation of all natural com- 

 pounds. 



7. Experiments in the deformation of rocks under conditions of 

 great stress, not only in one direction, but with unequal stresses in 

 different directions, and under wide ranges of temperature, moisture 

 and other conditions. 



8. Determinations of the relations of pressure to the melting point 

 while under differential stress and other variable conditions, includ- 

 ing variable amounts of water, vapors and gases. 



9. Determinations of the conductivity of rocks and the laws of 

 variation of such conductivity under varying conditions of heat and 

 pressure. 



10. Determinations of the elasticity of rocks and the laws of vari- 

 ation of elasticity under varying conditions of heat, pressure, change 

 of state and change of substance, involving also experiments on the 

 compressibility of rocks. 



11. Experiments and mathematical investigations to determine 

 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 distributions 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 labora- 

 tory 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 covering the full 

 limits of the probabilities of the case. 



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

 distribution of the earth by astronomic data. 



16. Gravimetric measures at specially selected significant points 

 embracing (i) such points as will best determine the distribution 

 of gravity upon the ocean areas as distinguished from the conti- 

 nental, and on the border ground between these, and (2) at such 

 points as show notable variations of increase of internal tempera- 

 ture in depth (independent of obvious recent volcanic action) to 

 determine whether the observable variations are dependent on varia- 

 tions of density, and so possibly are dependent on compression. 



