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Show Lights on Streetg Street StreetDelay Delay Falling Fallingof g of Autumn LeavesNew Leaves LeavesNew New YorkIf York -If If - If y ) ou have a astreet astreet astreet street light and a shade tree treeclose treeclose treeclose close together , , in front of your yourhouse yourhouse yourhouse house , , " watch "atch atch the le lea\es lea es leases l\ l \ les \ es on the thebranches thebranches thebranches branches neal neaiest neatest est the lamp lampwhen , when the tree begirs beglPs begins to lose Its Itsfohage itsfoliage itsfoliage fohage foliage this tlus fall . . The chances are that the branches branchesgettmg branchesgetting branchesgetting gettmg getting the most light will 'V1U V1U ' keep keeptheIr keeptheir keeptheir theIr leaves longestObservahons longestObservations longest longestObservations Observations Observahons on the behavior behavlOr ot of otnight ofnight ofnight night lighted street trees h havebeen a v e ebeen ebeen been made here by Dr . Edwin Edwm B BMatzke BMatzke BMatzke Matzke of Columbia university unlverslty . He reports the retention of leaves leavesby leavesby leavesby by the most strongly lummated illuminated illuminatedbranches illuminatedbranches lummatedbranches branches , considerably past thedate the thedate thedate date of lea leaf ! tall fall from the rest ofthe of ofthe ofthe the tree . . 1 I How Light . Affects A.ffects Leav Leavds Leaves s . His studies stuwes were made on Caro Caro- Carohna Carolina Carolina - - lina hna poplar , , . two species speCles of sy S syca sycamore ; ) ca- ca camore camore - more , . and the crack willow wl110w - all alltrees alltrees alltrees trees able to survive the somewhat somewhatunfavorable somewhatunfavorable somewhatunfavorable unfavorable conditions condlbons ot of New York YorkClty Yorkcity Yorkcity Clty city streets . The poplar eventually lost all of ofits ofits ofits its leaves in the normal way , but butthe butthe butthe the leaves of the two sycamorespecies sycamore sycamorespCCles sycamorespecies spCCles species clung fast to the tree unhl until unhlthey untilthey untilthey they were frozen to death . |