TABLE OF OOH'TENTS. 



The Present Position of the Periodic System. F. P. Venable. 1 



Notes on the Exact Computation of the Queen Post Truss. W. Cain.— 43 

 Some Late Views of the So-called Taconic and Huronian Rocks in 



Central North Carolina. H. B. C. Nitze.. _ 53 



