NOV. 4, 1921 SCIRNTIFIC NOTES AND NEWS 447 



atioii which has hitherto been connected with the lower Cambrian fossiliferotis 

 Chickies quartzite of Pennsylvania. The work of the writers in the last two 

 years has led them to conclude that the Setters formation is older than the 

 Chickies quartzite. The vSetters is overlain by the Cockeysville marble and 

 the Wissahickon formation. An upper member of the Wissahickon formation 

 that is less highly anamorphosed than the Wissahickon itself has been sep- 

 arated and named by the writers the Peters Creek schist. The Peters Creek 

 schist may represent the Harpers schist member of the Mont Alto quartzite 

 of central Pennsylvania, in which case the metamorphic series comprising 

 the Setters formation, Cockeysville marble, Wissahickon formation, and 

 Peters Creek schist would be, as suggested by the writers, basal Cambrian. 

 The Chickies quartzite in Pennsylvania has been shown to be GOO feet above 

 the base of the Cambrian. 



The Camargo schist is the name given by the writers to a porphyritic albite 

 schist that comformably oAcrlies a dolomite of probable Beekmantown age. 

 It forms the ridge that flanks Chester Valley on the south and comprises a 

 portion of the formation formerly known as the Octoraro schist. It may 

 represent the metamorphosed equivalent of the Normanskill shale found 

 near Harrisburg, Pennsylvania. The contact between the Wissahickon 

 formation, Peters Creek schist, and the Camargo schist on the southwest 

 border of the Camargo schist is a thrust fault called in the report the Drumore 

 fault. It has been traced from Trenton. New Jersey, 150 miles southwest 

 to Carroll County, Maryland. Further work on the northeast continuation 

 of this fault will help to establish a correlation between the geology of New 

 England and of the Pennsylvania Piedmont formations. 



O. E. Meinzer: a map of Pleistocene lakes in the Basin-and-Range Province, 

 and its interpretation. (Illustrated with lantern slides.) 



Laurence LaForge, Secretary. 



35STH MEETING 

 The 358th meeting was held in the lecture room of the Cosmos Club at 

 8 p.m. on Wednesday, March 23, 1921. 



Regular Program 



h. H. Adams: The elastic properties of rocks. 



Laurence LaForge : Suggested modification of the doctrine of peneplanation 

 in the light of recent knowledge. - W. T. Thom, Jr., Secretary. 



SCIENTIFIC NOTES AND NEWS 

 The thirty-eighth annual convention of the Association of Official Agricul- 

 tural Chemists was held at the Washington Hotel on October 24-26. 



An Executive Board meeting of the American Engineering Council was 

 held at the Cosmos Club at 10 a.m. on Friday, September 30. Reports were 

 presented from the Council's committees on licensing of engineers, classifi- 

 cation and compensation of engineers, Employment Service, and other 

 matters. 



The following lectures have been given before the Physics Club of the 

 Bureau of Standards since the last report in this Journal (p. 171): April 

 4, 1921, S. J. Mauchly: The methods and problems of atmospheric electricity; 

 May 27 (joint meeting with Mathematics Club), J. S. Ames: Some appli- 



