This is a scarce Australian trade reference booklet aimed at bush saw-millers, carriers, and timber merchants, providing ready-reckoner tables for calculating the superficial and cubical contents of round and square timber logs by circumference and length. A practical pocket-sized working tool from the early-to-mid 20th century Australian timber industry, published by E.W. Cole in Melbourne under Commonwealth of Australia registration for postal transmission as a book.

Condition: Softcover/paperback booklet in used, well-handled condition. Brown card covers show noticeable wear, edge rubbing, and toning consistent with age and heavy practical use as a trade tool. Spine is intact but shows shelf wear and creasing. Text block is complete and clean with all table pages present and legible; light foxing/toning to page edges typical of the era. No loose pages noted. A genuine working copy rather than a pristine collector's item, reflecting its original use in the timber trade.