Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 41 – 42The Society, 1902 |
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Сторінка 54
... reached the limit of its backward growth it entirely covers the peduncle , the extremity of which nearly fills the circular opening of the mantle chamber ( Figs . 34 and 36 ) . This is the oldest stage which I have had opportunity to ...
... reached the limit of its backward growth it entirely covers the peduncle , the extremity of which nearly fills the circular opening of the mantle chamber ( Figs . 34 and 36 ) . This is the oldest stage which I have had opportunity to ...
Сторінка 67
... reached the conclusion that the brachiopods are chatopod annelids . Morse says in summing up his work on the subject ( ' 73 ' , p . 57 ) : " We must regard the brachiopods as ancient cephalized chatopods , while Serpula , Amphitrite ...
... reached the conclusion that the brachiopods are chatopod annelids . Morse says in summing up his work on the subject ( ' 73 ' , p . 57 ) : " We must regard the brachiopods as ancient cephalized chatopods , while Serpula , Amphitrite ...
Сторінка 90
... reached , or the connection is of so tenuous a character as to escape observation . In structures of such minuteness the latter might easily be the case . A point bearing on this matter , and therefore of interest to deter- mine , is ...
... reached , or the connection is of so tenuous a character as to escape observation . In structures of such minuteness the latter might easily be the case . A point bearing on this matter , and therefore of interest to deter- mine , is ...
Сторінка 138
... reached such a field . In the first place , Franklin would see in a spark six feet in length a veritable flash of lightning , brought out of the skies into a laboratory where it can be studied at all times and under almost any imposed ...
... reached such a field . In the first place , Franklin would see in a spark six feet in length a veritable flash of lightning , brought out of the skies into a laboratory where it can be studied at all times and under almost any imposed ...
Сторінка 139
... reached with this large electrical plant . I believe that I have proved that water vapor is essential for the passage of electricity through the air or gases . Just as a certain degree of moisture is necessary for chemical reactions ...
... reached with this large electrical plant . I believe that I have proved that water vapor is essential for the passage of electricity through the air or gases . Just as a certain degree of moisture is necessary for chemical reactions ...
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Africa AMER AMERICAN PHILOSOPHICAL SOCIETY animals appear April Asia Australia auta autic beds belong blastopore body brachiopods Cambaroides Cambarus canals cells Central chromosomes cœlom connection contains crude oil Crustacea crystals curves Decapods deposits distillates distribution division domeykite drones eggs enteron Eocene equation evidence existence fact fauna Feb'y fertilization follicle formation forms fossils freshwater genera genus geographer geological Greater Antilles hydrocarbons islands Jan'y Jurassic land larva larvæ later Lower Cretaceous male mantle mass Mesozoic method Mexico Miocene nature Noctua North northern nuclei observed Ocean Oligocene origin parthenogenesis Pennsylvania petroleum Philadelphia PHILOS plate Pliocene polar body posterior Potamobius present probably PROC produced Prof queen region relation represented river sandstones separated shown solution South America southern species spermatocyte spermatogonia spermatozoa stage Terebratulina Tertiary theory tion Upper Cretaceous Zool