Postal Requirements
Postal regulations provide that—
When it (butter) is so packed or wrapped as to prevent damage to other mail, it will be accepted for local delivery either at the office of mailing or on any rural route starting therefrom.
Butter will be accepted for mailing to all offices to which in the ordinary course of mail it can be sent without spoiling when suitably wrapped or inclosed or when packed in crates, boxes, or other suitable containers to prevent the escape of anything from the package, and so constructed as to properly protect the contents. More than 50 pounds can not be sent beyond the third zone.
The firmer varieties of cheese, not being liable to cause damage in the mails, need no special consideration when properly packaged. In some cases it will be found that the express can be used to better advantage than the parcel post.
The rates on parcel-post packages vary according to their weight and the distances shipped. Persons not familiar with the postal regulations governing parcel-post shipments may obtain specific information at any post office regarding the rates and limits of weight and measurement applicable to shipments to any other office.