Xll 



BULLETIN OP THE GEOLOGICAL SOCIETY OF AMERICA 



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CORRECTIONS AND INSERTIONS 



All contributors to volume 18 have been invited to send corrections and insertions 

 to be made in their papers, and the volume has been scanned with some care by 

 the Editor. The following are such corrections and insertions as are deemed 

 worthy of attention : 



Page 123, line 7 from top ; for "1x6" read IX h 



" 144, line 2 from bottom; for " prediminating " read predominating 



" 168, line 5 from bottom ; for "appears" read appear 



" 173, line 18 from top; for "at the Washington" read, at the end of the 

 Washington 



" 179, foot note ; for "December 29, 1907," read December 29, 1906 



" 209, line 5 from bottom, omit "all" 



" 229, lines 1, 2, and 3 from top ; should follow lines 4, 5, 6, and 7 



" 2.34, line 12 from bottom ; for " cinders " read continents 



' ' 427, foot note ; for " Received by the Secretary of the Society from the Cen- 

 sor, September 13, 1907," read Published by permission of the Director of 

 the U. S. Geological Survey 



" 478, line 12 from top ; for "those in intrusion " read, those of intrusion 



