CONTENTS. 



Page 

 I. The Prehistoric and Kiowa County Pallasites. By Oliver 



Whipple Huntington 1 



II. Preliminary Notes on the Species of Doassansia, Cornu. By 



William Albert Setchell 13 



III. On some Theorems which connect together certain Line and 



Surface Integrals. By B. O. Peirce 20 



IV. The Quantitative Determination of Arsenic, hy the Berzelius- 



Marsh Process, especially as applied to the Analysis of Wall 

 Papers and Fabrics. By Charles R. Sanger ... 24 



V. On the Structure and Development of Choreocolax Polysiphonice, 



Reinsch. By Herbert Maule Richards 46 



VI. On the Matrical Equation <^i2 = £2 0. By Henry Taber . 64 



VII. On the Products obtained by the Action of Nitric Acid upon 

 Bromtrinitrophenylmalonic Ester. By C. Loring Jackson 

 and W. B. Bentley 67 



VIII. Note on Trihrommononitrobenzol. By C. Loring Jackson 



AND W. B. Bentley 98 



IX. 0)1 a Kephir-like Yeast found in the United States. By 



Charles L. Mix 102 



X. Dampening of Electrical Oscillations on Iron Wires. By 



John Trowbridge 115 



XT. Contributions to American Botany. By Sereno Watson 124 



