Which of the following is NOT a log scale used to estimate the number of board feet?

The scale referred to in the multiple-choice question is an important aspect of forestry and timber measurement, often used to estimate the volume of logs in board feet. The correct answer indicates that "Franklin" is not a recognized log scale utilized in this context.

The International scale is commonly used and is one of the most widely accepted formats for calculating board feet in logs. It accounts for the different sizes and shapes of logs and is based on a standardized system.

The "Scale of one" is another approach that may be less commonly referenced but is nevertheless a legitimate method to gauge board feet.

"Regulation" likely refers to another type of business or operational standard used in the industry, aligning with official measurements, although not as well-known as the International scale.

In contrast, "Franklin" does not correspond to any established log scaling method recognized in forestry practices. Therefore, it stands out as the answer to the question, clarifying understanding in the context of industry standards and practices for estimating lumber volume.