CONTENTS 
PAGE 
SEESEGDYE QE SUPLLIGIIOS) 3, Sa Se area ae Po ae ae sa ne ot 751 
CLUETGLAIGE oo 0 0b 0-6/8 Aig NaN aa Re ee Un ee Oe re oR A rt 752 
Peet eMC TMM LOM 2 s.sccsesei oe ces elle e els lads ged fl Uae an beay. 753 
DWinranionwotstizma receptivity. 6. io0.05 sc. eee be Lek oes. 754 
nollemmloneevity.. ..6....5 5.0500. CUS eat Hd eae ens eran 755 
in@sciolescauses of death of pollen... 2... 0.00.06. 06 5.2..0. 000228 758 
> LJP STTOS TONE OLA Ce AGOO 
Wesel nommomoOlleMy ice, «4.2 Mel ak hn has losiese ara lee Soo nl cals 759 
Pollen of snapdragon (Antirrhinum majus L.)............. 759 
Hollenmotacorm|(ZeauVlays Ti). see ee 760 
NMethodkotmpollen germination... 60.6604. 8. eo 761 
Cenmmationyof Antirrhinum pollen: ...)..2.....2..2..... 761 
Cepuamatromvolr corm pollen". 454... 45. oe eee 763 
Duration of receptivity of the stigmas of Antirrhinum........... 765 
Storage experiments with Antirrhinum pollen................. 766 
imiencerOr temperature miss 26 Wo se ake ate 766 
Mintitencerolacar bon Gioxide oe fos: 2 ho cad os ses ole i 769 
iinilwemeeror reduced: pressure... s......5..%..2.-...4.. 226 770 
Imfiuenceyof storage im pure oxygen. ...............1..... 770 
Possible causes of death of Antirrhinum pollen................. CP? 
ILGSS Git INONSIUTRE Sey eee ee ete ea ae ne Gt 772 
INES MMATIOMVEXPETIMENT. . fc 2 cj. ce es oe ere bee one 772 
Wepleompor cane sugar. 20.8 2d eMac. oes eee ee 172 
Weckeaserom certain, CMZYMES.). .; 5. 62 nl eo we bale tole! 773 
Svoracerexperments with corn pollen........................- 77 
iRossibleicauses of death of corn pollen....../.............5..- 780 
PIS SROMBIMNOISU UEC 3:5 52 ul eerie) nea a) ftsslevd ye ease mat ae akaclga helt 780 
peEMIMents ON TESPIratlON. 2. ).. 2... ee ene ete bee eee 781 
Spancneconbentsor pollen ssa). 20i.4% sa sols is ag ee ae 782 
AN STFS: BKCUIN AUIS ce cease A ee a am ra aaa And 782 
Wavalaseeacuival yer us Meee ear eot care vce’ BIN cece susiensen «snes awe 783 
Resistance of pollen to extremes in temperature............... 784 
—-ASIUNSISTSOVG: COLT” TESTU RIAA lee ee ra eT arts ret 786 
ETE py PUMI YR S855 As ocnseiheccahé eee + oS ¢ sedvcueaetudtnle & hacuaeel s Site 787 
EAGT VIG CHOU CINEOMES Sra oi uM ep Oe artic cata & sos ecsue erate el avanee alex cia: Shep ue 788 
AMR SEreT (OLN PP Py Ses hcl chos ons, clos velsto cols) a0. oe". o, disiet ei ele'd. © whajelele ole elfen 789 
747 
