ILLUSTRATIONS 
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Hugo de ae yer Fore eee ae ere ae eee etme es 2 Frontispiece 
Prof. de Vri ree anting the Sweet-Gum Tree........,..0..s.seeccee., 2 
Sweet-Gum Tree (Liquidambar Styraciflua), planted by Prof. de Vries. 4 
Tree Pla anting a Sepbetininet 1a) LOUD ec pyc een ee 5 
BoE eee ye es UNG baka Renee Ae cee p. 25 
Laying the 2 dan ions of Section I of the Laboratory Building .. 28 
Beginning ae Superstructure, Laboratory Building and Conservatories 
The ee agrees leg a1 ga Oe 31 
ie: East of Me ee Reservoir, Assigned to the Institute for Botan- 
BURG a eh fk ce, ee ee es: 35 
Shaded Pan Alone the icioe Mound, West of the Local Flora Va lley 47 
: sea on the Eastern Slope of the Local Flora Valley yay 25, 
52 
cal Flora V VANCED ULL acc soc, terse a it ae ee 58 
Preparation for Willow Bee: oa Pool of the Brook, October 17, 
Yes 1b ap! 3 (C] at vege ee Om UNS” ree 55 
View “Along the Brook, July 25, 1912, Looking North From Just Below 
Fitchette eases Weta s eases vets ce ra 91 
iG ooking Soi Along the Brook, May 9, 1912, Showing Depth of 
Sao er ara ee eS 92 
Excavation of the pee Course, Showing the Method of Constructing 
GoM aes SRC Trak te cate areri mts Wace re Wane eh eo ee ee ee 96 
G hacia Boulders Encountered in the Course of the Brook Below Dam No 
Bae Rated Cig ghana eed een eat tune Mea ae ay Oe ne eA 99 
ee ae Phytogeographical Excursion, 1913: Visit to the Garden, 
BD ay ane een ra ee ee ee a eee Opp. p. 109 
HRRATA 
Page ae line 24, for Sir vaciflua read Styraciflua. 
44, line 19, 
“106, line M4, “18,496 read 17 se 
a * ‘ine LG. ay bet Wea aus tala. 
“line 19, “ 18410 & aes. 
