186 F. D. ADAMS EXPERIMENT IN GEOLOGY 



tion — but very elaborate eqiii23meut and large endowments. The chief 

 advances, therefore, are to be expected from great laboratories equipped 

 for this special work, such as the Geophysical Laboratory of the Carnegie 

 Institution at Washington, to which frequent reference has been made 

 above, and from which, under the direction of Doctor Day, and with in- 

 vestigators of such distinction as F. E. Wright, ^YashTngton, Sosman, 

 Johnson, Bowen, and others who have been and still are connected with 

 its staff, a continuous series of publications of the highest value has 

 issued, which, being based on the results of accurate observation and 

 exact measurement, will remain permanent contributions to geological 

 knowledge. 



By such investigations petrology will be made an exact science, and it 

 is difficult to overestimate the advances which may be thus made in many 

 other branches of geology in that new era to which Daubree^- refers in 

 the closing sentence of his great work on metamorphism, when he says: 



"Geologie a eufin aborrle mie uouvelle periode on elle s'eclairera clans ses 

 plienomenes de tout ordre, chimiques, physiques et mecauiques, par Texperi 

 meutatioii syiithetique, subissant ainsi des phases analogues a celles que la 

 physique a traversees pour arriver, de I'etat ou la prit Galilee, au point ou 

 nous la voyons aujourd'hui." 



32 fitudes et Experiences syntlietiques sur le Metamorphism. Paris. 1860. 



