CONTENTS. XV 



No. XI. 



Analysis of the Hydraulic Lime used in coiisUuciiiig llie Kiic Canal 



in the State of New York. By Henry Seybert. - - 229 



No. XII. 



Papers on Various Subjects connected with the Survey of the Coast of 

 the United States. By F. R. Hassler. . ." . . 232 



(For a List of the several Papers contained in this Number, 

 see page 4'20.) 



No. XIII. 



Memoire pour accompagoer le Tableau des Observations Mfcteorolo- 

 giques faites a Washington, depuis le 17 Avril 1823 jusqu'au 18 

 Avril 1824. Par Jules de Wallenstein, Menibre Correspondant de 

 I'Acadcmie d'Histoire de Madrid. - - - - 4-21 



No. XIV. 



On the Language, Manners, and Customs of the Berbers, or Brebcr«, 

 of Africa. Communicated by William Slialer, Consul of tiie United 

 States at Algiers, in a Series of Letters to Peter S. Du Ponceau, and 

 by the latter to the Society. ..... 43$ 



No. XV. 



Solution of a General Case of the Simple Pendulum. By Eugcnius 



Nulty. - - - - - - - - 4G(> 



No. XVI. 



Notice nf a New Crystalline Form of the Yenite of Rhode Tslaml. 



By Dr. G. Troost. ...... 4:» 



Donations, &c. - - - - - - - 4hl 



