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REPORT ON THE OPERATIONS OF EXCHANGES. 



2. A list of the addresses and a statement of contents of each sending 

 to be mailed to the Smithsonian Institution at or before the time of 

 transmission. 



3. Packages to be legibly addressed, and to be indorsed with the name 

 of sender and the contents. 



4. Packages to be enveloped in stout paper, and securely pasted or 

 tied. with strong twine — never sealed with wax. 



5. No i)ackage to a single address to exceed one half of one cubic foot 

 in bulk. 



6. To have no inclosures of letters. 



7. To be delivered to the Smithsonian Institution or its agent free of 

 expense. 



8. To contain a blank acknowledgment, to be signed and returned 

 by the party addressed. 



9. Should returns be desired, the fact is to be explicitly stated on or 

 in the package. 



10. Unless these conditions are complied with, the parcels cannot be 

 forwarded by the Institution. 



RECEIPTS. 



1. For foreign transmission. 



