CONTENTS. 



Page 



I. On the Determination of Sulphur in Volatile Organic Com- 



2)ounds. By Charles F. Mabeey 1 



II. Double Haloid Salts of Antimony, Calcium, and Magnesium, 

 with Observations on the Remarkable Dissociation of these 

 Compounds. By Francis Gang Benedict, A.M. . . 9 



III. The North American Ceuthophili. By Samuel H. Scudder 17 



IV. Neio Plants collected by Messrs. C. V. Hartman and C. E. 



Lloyd upon an Archceological Expedition to Northwestern 

 Mexico under the Direction of Dr. Carl Lumholtz. By 

 B. L. Robinson and M. L. Fernald 114 



V. On the Constitution of the Nitroparaffine Salts. By J. U. Nef 124 



VI. On Bivalent Carbon. Second Paper. By J. U. Nef . . 151 



VII. On the Properties of Batteries formed of Cells joined up in 



Multiple Arc. By B. O. Peirce 194 



VIII. On the Cell Lineage of the Ascidian Egg. A Preliminary 



Notice. By W. E. Castle 200 



IX. Wave Lengths of Electricity on Iron Wires. By Charles 



E. St. John, A.M 218 



X. A Heat Method for Measuring the Coefficient of Self-induc- 

 tion. By p. G. Spalding and H. B. Shaw . . . 247 



XI. Researches on the Complex Inorganic Acids. By Wolcott 



GiBBS, M.D 251 



