Those are nor, of course, surrgeuted 

 Thoy aro only rovrh ertw.iloa ^ivon to make tMs idee 

 irore real. ' ur-i roujrli because any e:caot example 



woxild nrocl BOB9 blOwladB of tho rate of grov;th of the 

 Forcot In ItH '.ifforonb ptirto in order to taiov: <.v:mt It 

 in :;! 1 ir:,-, bofore -'odding what parts of it would 

 rro'"-,o ti ber regularly as a crop, In ovfficient 

 quantity to juitify ooviiderinr thoeo parts aa ~o-arate 

 IT Us of t\e nholc foroot, each to bo handled different- 

 ly to r a';e it produce its crop. 



the boundaries of any wording circle 

 enl larf/aly on topocrar-hy tbio is not the only factor 

 it ~uit lo rcreraborocl. In a flat Country it rirht not 

 enter into t!if r-i'oblem. Two j arto of a foroet, both 

 oa^ablo 01' v-rov.".i;cing tinbor ri^ht along, supplying 

 difforont n?a:-l:eto, pornlblr oejarated ty diotlnct topo- 

 rr-Aphio bouivilarioa, mi^bt bo ->aUe trro different wording 

 c^roleo. The tiling, of priwo Importance ie tliat each one 

 vrill noM a Different method of rofulating tlie cutting 

 of ito tinber oo aa to nalre it :r^ ? uce tinber ri^it 

 along. In the future, -..-hen the ru'.nagercent of a National 

 Korost neoda to bo more intensive, etill other points 

 will be ooneiderou v'-.on divi^inp; o. foroBt into ;;orl-ing 

 circlen. TJ>e^e will to Evch things ao different forest 

 free yellow i ine typo, Dour-laa f ir-yellotr pine 

 pine type, etc.- alco different waya of cutting the 

 timber so as to ir.^Vo it rorrcU'co itnolf, called 

 "^ilviculti'ral orutora" cl-;:.i* cutting, neleotion B 

 etc. ar..l l'v Mr.d oi 1 ;r "etc vented fron tho foroot 

 saw tinber, r-ininc timbers, r*>v-.lv;ood, eto. : 3n tho other 

 har.d on ooi.ie National r-'o;")3t3 today, any -.livieions into 

 wor'.-ir.r circles is \ % nnocoocary. On these the division 

 into blocks made up of lo~- i:>r mits is sufficient. 



The Block IB a division of a worlrinp; circle nade 

 to help in arranging t}ie cv.' tinp; of the tlrbrr. AJ 

 one workii:? circle mifjit Ve tlivi.-Jo'l into r-ev^ral blocko 

 each of w- ich would be cut over in a oinrle cxitting 

 period, cay of ten to thirty yearn, cloponding on the 

 anount of timber to be not out. ^e basis for divid- 

 ing a v.-orking circle into blocks la, thon: 



Lopging units, or groups of these. 

 Topocraphio boundaries. 



For instance, on the Trinity roroct, Bir CreeJc, Tc-rliep 

 Greek and Carr Creek Eight fora one block, or Dig Crfa 

 alone rnir^t forn one, smaller block. In the latter 

 it Kight b'- ^own as fii>: Creel: Eloc': an.-? ould Include 

 the whole area of tho Elf. Greek drainage.. 



