No. 475] 



NOTES AND LITERATURE 



531 



E. C. Eckel has prepared a report on "Tlie ("cm 

 Industry of the United States," which forms Hidlrlii 

 States Geological Survey. The report consists ol' t\\< 

 first, the technical processes involved in ccnKMit 

 second, the distribution of cement materials. The 

 are divided into the Portland cements, the natural 

 Puzzolan cements. The distribution of each ..f thc>. 

 is treated according to States. The arraii^^cnioii 

 phabetical, and consequently necessitates repetiti 

 have been avoided if a geological arrangement li 

 The 15 map plates are of considerable importanc 



scribes the Austin dam and its dcstruct 

 of the dam seems to be attributable t 

 before construction. This is shown 

 flow of the Colorado was consiclerabl 



"The Water Resouircs ..f the Pliila.lclphia 

 Bascom, is published as Watrr Supplij and i 

 the United States- Geological Surrr;,. It cn,ua 

 precipitation and run-off for many ot' the stn' 



averages may be considered as cliaractcrisiic 

 these records it appears that in the district as 

 in excess of run-off. 



