IOWA ACAI)P:MY of sciences. 113 



TABLE OF CONTENTS. 



IOWA ACADEMY OF SCIENCES. VOL. I, PART III 



PAGE. 



OfHcersof the academy 3 



List of papers ' .5 



Membership of the academy 6 



CAiiViN on Cretaceous Deposits, etc 7 



Note on Cerionites dactylioides Owen 13 



Keyes. Natural Gas in Iowa 15 



Iowa Mlneralogical Notes 18 



Surface Disintegration of Granitic Masses 2a 



Some American Eruptive Granites 24 



TiLTON. Strata between Ford and Winterset 26 



Bates. Analysis of Water for Railway Engines 27 



Witter. Some Observations on He?i.r cooperr 28 



On the Absence of Ferns between Fort Collins and Meeker, Colo 29 



Notice of Stone Implements 30 



Drew. Some Reasons Why Frogs are Able to Survive 32 



Nutting. President's address 35 



Report of committee on state Fauna 39 



Significance of Concealed Crests of Fly catchers 42 



Pammel. Phaenological Notes for 1892 46 



Notes on Flora of Texas 62 



The Relation of Frost to Certain Plants 77 



Pollination of Cucurbits 79 



Stewart. Palisade Cells and Stomata of Leaves 80 



Key to Weed Seeds in Clover 84 



NiLES. On Cattle Disease 90 



Reppert. Pellaea Atropurpurea on Sandstone Ledges 93 



GossARD. Clover Insects 94 



OSBORN AND SiRRiNE. Notes On Aphididae 98 



OSBORN. Life Histories of .lassidae 101 



Additions and Corrections, Iowa Hemiptera '...103 



Meek. Fishes of Cedar Basin . .105 



