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by tlie pottei-y faeSa-y at tlie teginning c,f the ! 3tb centm-i. Itis then
ratliei-sti-ange tliat tiis autlioi- bas teen unable to discover in tiis Norrhagen ivc.ods
any of tiis npn-edcrns licliaisi1 of Piby. Within less than acsntuiy tlisy slioidd
acsording to tilis liypothesis havs migrated liere, and tlieir commimities
havs s o abi bred thaiiselves in ti« spu-vce foissts (und tiis forest itsslf Ind to
i-si s n siats after tlis ravagings of tlis factory!).
Tlie formaten and apipearance of storm vaps ais illustrated by ti« figiues
14 and 15. Campiarativ sly iscsnt storm-gaps and tiisil- regena-ation are
de-sa-ibed on p. 53 S8 lt slioidd bs snipliasiasd tliat it is not at all sesi to
recognise old storm-gaps in a foisst vdiidi may havs bssn subpeeted to
storm-fellin» seva-al times dvring tiis oenturies.
Natural foisst tlis types treated in tiis presait papsi- ais mainly
on v. ns tabis soil — appeai-s at fn-st siglit to te o chaotic co nf os ion of trees
of diffeisnt ag es and sizes, giowing in an eipvally cliaotic confosion of falfen
trunlts, sbs\m in all diisctions and in eea-y stavs ot’ neciotisation. A n visiter
of maps (figs. 72 76) and figvies (S, 18,22, 28, t! 1) SlJustiate thsss oonditions.
Tlisy also show that. althoutpli it is pi-acticall.i iuiyossibls to males a perfeet
isconstt-uction of otd storm-gaps. fragments of tleir boundaries i»iy aften te
ti-acsd in tiis stnictoie c.f tiis foisst.
Li tiis present in ves ti gation peat research, and particularly pollen analysis
and studies of clianges in level ais employed in order illucddate tiis sociological
development of the spnice foissts of Cianskiu- and Piby.
Gianslciii-, nov. totally coveied witli spi-vos fores t, rose from tle seaduring
tiis iion age, and in a peiiod suited foi- tiis dominance of spnice foisst.
The seguaice of strata in a. pool in tliansliiii- tig. 87 sliows tisat spiv.es pollen
fiom tle peiiod of nplift is ova-represaited, compaisd to a noinial pollen
Spectrum of tiis distiict (fig. SS).
Tle depressions novr filled witli peat ds posits in Pi by foisst wa-e is olated
tVom tlie sea during tiis neolitliic age the atlantic period —, tefoie tiis
s pr ves liad attainsd any inipoi-tance in S v edis b foissts. Corsequently, the
bottom lai-evs of tie peat dsposits contain no spruce pollen, but upv.-oids fi-oni
a cei-tain level in the subboreal peat spi-ucs pollen fe ova-vepi-esaited, wliicli
indicatss tliat tdieis lias bssn a continons spnice foi-sst moirnd tlisss togs.
No trace at all is to bs fonnd of an intemiption br. con-espond witli a peiiod
of tlie suppes ed pastm-e (Jig-, 85).
The last -part of tlie papa- deals mainly witli rccait rsyorti liandsd in in
connection witli tle (pisstion of the consevvati on of Piby foisst .U lms
ali-eady pisvi ovsly bssn csi-tified by two pa-ominent enpa-ts in tlie foissts of
Uppland, tlie County Poisstvy officer, LLinsen, and tlie Po rester of tlie
Univa-sity of Uppsala, Komu-nc, tliat ioday the foissts of Piby, totli
the )>jne foisst of tlie l-oclcy gi-ovnd and tlie spnice foisst of tlie boulder
moiain , as the test-pa-eserved esamples of types of vegetation within the
pio vines.
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