7 
TABLE I 
D.B.H. 
Species Inches 
Red Oak (2) cote scdce padi cc fe aaree 30.4 43.5 
Chestnwt-(2)? cscsciitet. an selnaw a wae 26.0 29.8 
NBM 3c tcedioie SN AA dat dendind ncunisich dedicat 26.4 
BaSSwO0d ics sci avasien wane ane Pema 26.4 
Sugar Maples. 2 vac 5.< cute no aine sen aces 23.1 
Yellow Birch.....................00. 15.7 
It is most probable that these trees were mature and bear- 
ing seed when the surrounding fields were abandoned. To 
the west of the fence and the row of old trees was formerly an 
abandoned field which grew up completely to pine. This 
stand was cut off a few years ago and to-day the field is com- 
pletely covered with hardwoods. There are no pines in the 
young stand, although there are mature pines in the sur- 
rounding areas. As the prevailing winds are northwest and 
southwest, the seeding up of the field by the row of old hard- 
woods was distinctly at a disadvantage both formerly and at 
the present. The following table gives some idea of the com- 
position of the young stand which is thirteen years old. The 
plot used for the estimation of the composition was one- 
twelfth of an acre and the number of trees per acre averaged 
3800. 
TABLE II 
Percent of 
Species ixture 
Sh isis Sra aoe eon DAVAO eae oa kaa eine ene 57 
Sugar Maplé..o ons sous yien gry weeds wale Geetha 20 
Reed! Oak cbives deans Bette acs ous A ot o ian wanudee eset 8 
Gray: Birchsdrs sé). chew eae te eae bes we 4 
Red: Maple si: cies eee eee sea ew ee oe PRS 3 
BIB CRB inGhh iss 2 erce Gua acta wth ear Rede Manet ease Gordes 2 
Yellow Birohts su sac sraieciicgas Guns 4 wea spincs a ava oa-auanbss 2 
Pine Chetty cid iedeeccerp nents aahiela aitndie h8 ate dba 2 
Basswood ss oe ccch gon cietaatcs, Hearts hnbacw ave anda too da 1 
Miscellaneous: ¢ vsvsvq.aatitas eatin koa ook ale 1 
The third factor influencing this succession is the intoler- 
ance of shade shown by the pine. It has been clearly shown 
on the Harvard Forest that by suitable fellings a reproduc- 
