A new system of registration of letters by carriers will be put in operation next Monday, April 16, by order of the Third Assistant Postmaster General.

Only letters can be registered, and they must be ready in every respect when the carrier calls, for he is forbidden, on pain of dismissal, to wait even the fraction of a minute longer than is necessary to write a receipt.

Every letter must be enclosed in an envelope strong enough to carry contents and be in perfect condition.

The envelope must bear the name and address of the sender, name and post office address of the addressee, and have the postage and registry fee prepaid, either with stamps attached or in money, the exact amount to ho paid to the carrier.

The writing on the envelope must be plain and legible.

The registry fee for letters, foreign and domestic, is 8 cents in addition to full postage.