STEIP SURVEY AXD GROWTH STUDIES IX LA 

 SALLE COUNTY. 



R. B. Miller,, State Forester^ and Geo. D. Fuller^ 

 University of Chicago. 



During the week of Sept. loth to 20th it was possible to 

 run some strip surveys in some of the forest tracts pre- 

 viously located by Dr. George D. Fuller in La Salle Countv 

 which were representative of the types of this region. The 

 results of these strip surveys are given in the following 

 pages appended to Dr. Fuller's report, and for convenience 

 are lettered from A to I. in the order in which they were 

 made. 



The method was that of the ordinary strip survey famil- 

 iar to all foresters and estimators of timber and was car- 

 ried out with a crew of three men. one compassman and two 

 estimators. The compassman, with a 4-rod tape attached 

 to his belt, ran the compass across the tract and tallied the 

 trees according to diameter and species as they were called 

 out to him by the men on each side, who covered each a 

 strip 33 feet in width. When the party had advanced a 

 distance of ten chains, or 40 rods, an acre of gi'ound had 

 been covered. The estimate as made tip from these strip 

 acres was then applied to the tract as a whole. This 

 method does not differ from the laying out of "quadrats'' 

 by the ecologist. each unit being an acre 10 chains long and 

 66 feet in width. It has the advantage of taking one across 

 the tract and allowing a map of types or physical features 

 to be made which in small woodlands is hardly necessary, 

 conditions being of such uniformity. When the strips are 

 run a distance of 10 chains or 660 feet apart, one-tenth of 

 the tract or "forty" has been covered, giving a ten per 

 cent estimate. 



All trees were calipered at breast lieight. or lio feet 

 above the ground and as the party progressed notes were 

 made on reproduction, ground cover, and herbaceous vege- 

 tation. The tally sheets, with the distance traversed, are 

 retained and the estimate is made up in the office from 



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