THE YOUXGLOVE LOG RULE. 

 B3; Wm. W. W. Colton. 



The Younglove Log Rule is mentioned in the Woodsman Hand- 

 book and also in Graves' Forest Mensuration, but the author 

 states that he was unable to obtain the rule and could find out 

 very little about it. Consequently, when a few months ago I was 

 looking in a local hardware store for a caliper to measure logs 

 with, I was rather surprised to find that the only one in stock 

 was a Younglove Scale Caliper. 



Upon making inquiries, I discovered that the Younglove Rule 

 had at one time been the only one in use in this section of the 

 State (Fitchburg, Mass.) and that even up to the present time 

 saw mill owners and people selling logs throughout this locality 

 claim that the Younglove Rule is the only one to be used. As 

 there was so little known about this rule, I thought it might be 

 of interest to others to learn more about it and I have therefore 

 sought out the following information. 



The Younglove Rule was originated by Tyler Younglove, who 

 was born in Fitchburg about 1812. He was a carpenter by 

 trade and worked for many years in a local saw mill and lumber 

 yard. About 1840 he worked out this rule and in later years, 

 together with his son, manufactured calipers and sticks for 

 measuring sawed lumber. After his death, his son conducted 

 the business enlarging it to some extent and made scale sticks and 

 calipers of all kinds. He died a few years ago, and with him 

 died the secret of his log rule. A grandson of Tyler Younglove, 

 Mr. Wm. K. Younglove, is now a captain in the Fire Depart- 

 ment in Fitchburg, and through his courtesy I was allowed to 

 look over the papers and other effects of his late father and 

 grandfather. Among these, I ran across one copy of the mill 

 table for log measure which is in my possession. No record, 

 however, could be found of the principle upon which the scale 

 was made. I have talked with a number of old residents who 

 knew the old gentlemen in life, and the general opinion is that 

 the table was constructed from diagrams and from actual meas- 

 urements of logs at the mill. In comparing it with the other 



