II TABLE OF CONTENTS. 



SECTION in 



/. Presidential Address, by Alexander Johnson 1 



II. Blowpipe Reactions on Plaster of Paris Tahlels, bi/ E. Haanel 7 



III. On some Iron Ores of Central Ontario, by E. J. Chapman 9 



IV. On the Density of Wealt Aqueous Solutions of Certain Salts, by J. G. MacGtREGOR 1 ô 



V. On the Analysis of Silk. — Quantitative Estimation of Silk in a Mi.ced Texture, by H. 



A. Bayne 21 



VI. On, a Natural System in Mineralogy, with a Classification of Native Silicates, by T. 



Sterky Hunt 2ô 



VII. Tidal Observations in CiuKtil id II Tf'7//e/>'. />// Alexander JoHNf-ON 95 



VIII. On the determination in terms of a definite integral of the value of an Algebraical expres- 

 sion, the series to be continued only as long as the quantity raised to poiver, m + ]i, 

 is positive, u being a /tositive integer, and m a positive integer, zero, or a negative 

 integer numerically less than u ; and. on the deduction therefrom of approximate 



values in certain cases, by Charles Carpmael 101 



7-V. The Longitude of McGilt College Observatory, by W. A. Tîogers and C. H. McLeod. Ill 



SECTION IV. 



I. On the Mesozoic Floras of the Rocky Mountain Region of Canada, by SiR J. William 



Dawson 1 



II. On the Wallhridge Heinatile Bliue, as illustrating the Stock-formed Mode of Occurrence 



in certain Ore-Deposi/s, by E. J. CHAPMAN 23 



III. Geology of Cornirallis or McNaVs Island, Halifax Harbour, by Rev. D. HoNE'iMAN. 27 



IV. Illustrations of the Fauna of the St. John, Croup, continued. No. III. — Descriptions of 



neiv Genera and Species [including a description of a neio Species of Selenopleura, 



by J. F. Whileuves), by Gr. F. Matthew 29 



V. Catalogue of Canadian BvtlerJUes, with Notes on their Distribution, by W. Saunders. 8ô 

 VI. On the Skull and Auditory Organ of the Siluroid Hypophthalmus, by R, Ramsay 



Wright 107 



