vi CONTENTS. 



Page 

 VI. A Method for the Separation of Sodium and Potassium from 



Lithium by the Action of Amyl Alcohol on the Chlorides, 



with some Reference to a similar Separation of the same from 



Magnesium and Calcium. By F. A. GooCH 177 



Vn. On the Anatomy and Development of Agarum Turneri. By 



James Ellis Humphrey 195 



VIII. On the Morphology of Kavenelia Glandulaformis. By G. H. 



Parker 205 



IX. Experiments on the Melting Platinum Standard of Light. By 



Charles R. Cross 220 



X. The Inverse Electromotive Force of the Voltaic Arc. By 



Charles R. Cross and Wm. E. Shepard 227 



XI. On the Direct Conversion of Aromatic Sulphonates into the Cor- 

 responding Ainido Compounds. By C. Loring Jackson 

 AND John F. Wing 245 



XIT. On Benzyldimethylamine. By C. LoRiNG Jackson and John 



F. Wing 249 



XIII. A New Method for the Quantitative Determination of Hydroxyl. 



By C. Loring Jackson and G. W. Rolfe 253 



XIV. On Certain Cultures of Gymnosporangium, with Notes on their 



JRoestelice. By Roland Thaxter 259 



XV. Contributions to American Botany. By Asa Gray . . . 270 



XVI. On Mucoxybromic and Mucoxychloric Acids. By Henry B. 



Hill and Arthur W. Palmer 315 



XVII. A Determination of the Relation of the Atomic Weights of 



Copper and Silver. By Theodore W. Richards . . 342 



XVIII. On Benzoltrisulphonic Acid. By C. Loring Jackson and 



John F. Wing 348 



XIX. On the Action of Nitric Acid on Symmetrical Trichlorbenzol. 



By C. Loring Jackson and John F. Wing . . . 372 



XX. Observations of Variable Stars in 1886. By Edward C. 



Pickering 380 



