1904.] MINUTES. 53 



mates that of the typical diabase. The percentages of soda and 

 titanium are large. The former is probably due to the amount of 

 analcite present, and the latter to the character of the augite. 



The rocks are closely allied in character and age to those de- 

 scribed by Fairbanks from San Luis Obispo and Santa Barbara 

 Counties under the name of augite-teschenite. While analcite is 

 present in considerable quantity and is one of the most interesting 

 features of the rocks, it is also found in basic rocks in several in- 

 stances on the Pacific Coast, and its presence, taken in connection 

 with other properties of the rock, is not regarded as sufficient to 

 warrant the substitution of the name augite-teschenite for that of 

 diabase. That name has, therefore, not been retained by the 

 writers. 



Stated Meeting, February 19, 1904. 

 President Smith in the Chair. 



An invitation was received from the University of Wiscon- 

 sin to send a representative to the Jubilee of the University, 

 to be held at Madison, commencing June 5, 1904, and the 

 President was, on motion, directed to appoint a delegate. 



The donations to the Library were laid on the table and 

 thanks were ordered for them. 



The following papers were read: 



"Present Aspects and Future Prospects of Forestry in 

 Pennsylvania,'' by Prof. Joseph T. Rothrock. Discussed by 

 Prof. Haupt, Mr. Stuart Wood, Mr. Richard Wood, Dr. Mar- 

 shall and Mr. Goodwin. 



"Views of Old Philadelphia," by Mr. Julius F. Sachse. 

 Discussed by Mr. Goodwin, Mr. Stuart Wood, Mr. Harrison 

 and Mr. Richard Wood. 



"A Method of Controlling the Floods of the Mississippi 

 River," by Prof. Lewis M. Haupt. (See page 71.) 



