SELLING WOODLOT PRODUCTS ON MICHIGAN FARMS. 13 



thickness) by dots or short lines in the appropriate space.f The lum- 

 ber eontents of all the logs of each class can then be easily determined 

 by (1) finding in Table 6 or 7 the board foot volume of a log of the same 

 length and diameter insid)e iarh; and (2) multiplying this figure by the 

 number of logs. The total volume for each class may conveniently be 

 written into the proper space, as shown in the form, and these totals 

 may be added across so as to give the total volume in board feet of the 

 logs of each species and each grade. The form may be extended to pro- 

 vide for any number of species and diameters; it may be simplified by 

 omitting the columns for grades if a graded estimate is not desired. 



tA compact method is to record the first four logs by dots forming the corners of a small square; 

 the next four by straight lines completing the square; and the next two by diagonals, thus: 



'.' rr n la m 



(Hog), (4 logs), (6 logs), (Slogs), (9 logs), 10 logs) 



The logs thus grouped by tens can be easily counted. 



