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CONTENTS OF PART 



I. On the Embryology of Echinoderms. By Alexander Agassiz. . 



PAGB 



1 



II. Observations on the Development of Kaia 



By Jeffries Wyman 



31 



III. On the Construction of Hooped Cannon : being a Sequel to a Memoir " On the 



Practicability of constructing Cannon of great Calibre, etc." By Daniel Tread- 



well. 



45 



IV. Discussion 



Observations 



determining the most 



great Comet of 1858, with the object of 



G. W. Hill 



67 



V. On the Secular Periodicity 



% 



101 



VL On a Process of Fractional Condensation : applicable to the Separation of Bodies 



having small differences between their Boiling Points. By C. M. Warren, 



121 







VII. Researches on the Volatile Hy 



M. Warren, 



135 



VIII. Examination of a Hydro-carbon Naphtha obtained from 



stractive D 



the Products 

 Warren and F. H. i 



De- 



177 



IX. Examination of Naphtha obtained from 



and F. H. Stoker. 



& 



By C. M. Warren 



208 



X. A History of the Fishes of Massachusetts 



(With four Plates.) By David Hum 



PHREYS Storer, M. D. ( Concluded.) ....,.,., 217 





