202 Report of the Forest Commission. 



From the foregoing table it will be seen that it takes five and 

 a half markets to make 1,000 feet of logs. But in the Adiron- 

 dack woods five markets are, for convenience, always estimated 

 as a thousand feet, and this is approximately correct, for a 19- 

 inch log will yield 200 feet of sawed lumber. The Doyle rule 

 gives 183 feet only for a 19 inch log, 13 feet long ; but the log, 

 unless very crooked or defective, will yield more than that. 

 Hence, when a lumberman says he is getting in a stock of 100,000 

 markets he estimates it as equivalent — five markets to the 

 1,000 feet — to 20,000,000 feet of logs or sawed lumber. 



If the logs averaged 19 inches in diameter, such an estimate 

 would be fairly correct. But the usual run of Adirondack logs 

 will not average that, and so it requires more than five markets 

 to equal a thousand feet, Doyle's rule. 



On the other hand it is claimed that Doyle's rule makes too 

 great an allowance for slabs and saw kerf on small logs, and, 

 consequently, that an estimate of five markets to the 1,000 feet 

 is correct. Some lumbermen assert that, although their logs 

 will not average 19 inches, an estimate of five markets to the 

 1,000 will hold good as proved by the saw-bill or measurements 

 of the lumber produced from these logs ; or, as they term it, the 

 lumber will hold out on that basis. 



That it takes more than five markets of the smaller logs to 

 make 1,000 feet, Doyle's rule, is due to the fact that in this rule 

 the figures for the contents decrease in a greater progression 

 than the decrease in the squares of the diameters. 



In order that five standards should equal 1,000 feet we must 

 assume that the standard 19-inch log contains 200 feet, log 

 measure ; and that the logs of all other diameters contain a num- 

 ber of feet proportionate to the squares of their diameters. 



If five standards of any diameter are to be accepted as equiva- 

 lent to 1,000 feet it will be necessary to find some table of log 

 measure other than those given by the Doyle or old Scribner rules. 



For this purpose the following table has been prepared from 

 computations based on the squares of the diameters as used in 

 the standard rule, and the series of figures thus obtained will 

 warrant the ratio of five standards to 1,000 feet. 



