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Vol. XLY 



Ko. I 



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-*t<^ 



190 



Editors": JOHF M. COITLTER and CH AISLES R 



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CONTENTS 



Sporogenesis in Feplirodiuni 

 The Beyelopment of tlie Pollen of 



Embryogeny of Arisaema tiiphylliim 



Sbigeo 



T» 



M. L0ms« 



r- ■-" 



James Ellis Go-^ 



of Ctrtain Commoa Salts of 



the Soil on Plasts 



Florence H. Magowan 



riefer Artie' 3 



^ - 



Tlie Phyf "'>ia^ca1 C:nstants of PiaMs ComiBOEly Usmd. m 

 Ame -caii "Botanical Laboratdries 



riieCanaitir ^ifCertain Winter Bi^yis WilIiaia.2Iaorean2 



rcMt30.a 



S. letoaT 



Cmrrent Literattire 



Fews 



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1 ' ■ 



HiTei^i 



effiCAG^' aEd HEW YOIK ., 

 William Wesley ^.^i-^ S ^ e /" I^-e Hvd '3 



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