two men you could vor.: one, for you have 

 all the data before 3 r ou. You cue the time 

 rig'i'J in hc.lv by that method. 

 Margolin: I want to agree with Hill that 

 it is not nocossary to tally treae "by 

 inch classes. Dr.Judson P.ciarlr, formerly 

 of Cornell University, and author of the 

 International I orpine Rule, worlred out a 

 table for oer^ain British Columbia trees, 

 the use of which obviates the necessity 

 for tallying trees by single inch classes, 

 Ho ma~os several diameter classes, as,for 

 oziomplo: 24" to 32", 33" to 39", 39" to 

 45", etc., and all trees aro thrown in 

 these classes. I can not talie time to 

 onplain this nothod fully now, "but v/e 

 found that it worliod very satisfactorily, 

 and that the percentage of error in os- 

 tinating lay this table was vary snail. 

 The who ?.o voluno fca'blo i-osolvod itself 

 into a"bout 10 figuron which can "bo easily 

 remembered, or which can "be carried on a 

 snail slip of -jr.ner* ^ converting factor 

 is then applied to rc...uco the volumes as 

 obtained in the field to board foot 

 measure. If tho Chief of Silviculture 

 sees no objection I hope this winter to 

 v:or?: out a similar table for the species 

 in this District , so that all trees will 

 bo tallied "by tho sane table - and whon 

 you r-ot baclr to the office t,ioro will be 

 a reducing factor for tho different 

 species. If wo ado^t this syston it will 

 not bo necessary to do what Redin^jon 

 recommends , be cause as you along in 

 tho field you will bo able to estimate 

 actual volunos. You will say, "1 siigar 

 pine, 3000; 2 cu^ar pines, 5000. Tho 

 advantage of tliis is that it enables you 

 to tally the trees onactljT- whoro you 

 find then - You cloii't wait until tho ond 

 of -a forty. The further advantage is tli&t 

 you aro ablo to nal:e your stand tjrpes 

 right in tho field. Of course, that moans 

 that the forn would have to "be revised* 

 3ut I still hope to convince Mr.'Toodbury 

 that this is a protty good system. If it 

 goes through it is going to cave an onor- 

 rnouc anouiit of worlr. The fact that this 

 system is being used by commercial houses 

 shows that it is practicable. 



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