Note 75 — Chapter II · The Power of Congress to Establish Postoffices

37 Stat. L. 557. “That hereafter fourth class mail matter shall embrace all other matter, not now embraced by law, in either the first, second, or third class, not exceeding eleven pounds in weight, or greater in size than seventy-two inches in girth and length combined, nor in form or kind likely to injure the person of any postal employee or damage the mail equipment or other mail matter, and not of a character perishable within a period reasonably required for transportation and delivery” (Sec. 8). These limits have been, and will be, raised from time to time.