CONTENTS. 
Arr. XXIX.—Recent Explorations in the bah gan) i Valley 
Limestone of Dutchess County, New York; y W. B. 
ee a a ee Se ee a 
 XXXT. —Examination of Mr. Alfred R, Wallace’s modifica- 
tion of the oe Theory of Secular Changes of 
Chace By Onbahe taco at om eet se 
ieee —Contribation to Ave Geology of Rhole Island; by 
: ass IL.—Mesozoic Dicotyledons; by L. F. W ant ee 
 — Anc see Frcs Gorham, Maine ; by G. F. Keng, 
Sa wn Garnet from Wakefield, Canada; by G 
Horizontal Motions of small Floating Bodies in 
o the. ‘Of: 
ges Ue nerve an associated minerals of "Auburn, 
alid the = urea = the ceculy ae 
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