EDITORIALS. 225 



state the problems which still remain to be solved, and some- 

 thing of their relative importance. They will bring out the sci- 

 entific and economic advantages which have resulted, directly 

 or indirectly, from the surveys already executed. They will 

 indicate the general scope of the more important publications, 

 both cartographic and textual, which have appeared, and while 

 they are not intended to be bibliographic primarily, they will 

 contain references to the more important publications and 

 to such bibliographies as may have been compiled. In some 

 cases, at least, they will give the cost of the work which 

 has been accomplished. The plan also involves a series of 

 articles on the surveys in foreign countries. It is hoped and 

 believed that these papers will be of much value. A consider- 

 able period of time will necessarily elapse before the series is 

 completed, but in the end it is believed that it will constitute a 

 valuable compendium of geological work throughout the world. 



R. D. S. 



