what are their publications?
"Smithsonian" magazine.
Publications
The Institution publishes "Smithsonian" magazine monthly and "Air & Space" magazine bimonthly. 
who was adam eckfeldt? John Adam Eckfeldt was a worker and official of the United States Mint. when did he start designing coins? 1793 which coins did he work on in the mint? 1792 half disme what was his contribution as a chief coiner? He put aside interesting foreign coins sent to the mint as bullion. These pieces became the Mint's Cabinet, or coin collection. where is this collection housed? Smithsonian Institution when was it founded? August 10, 1846 how many of these museums are there? Nineteen
"Smithsonian" magazine monthly and "Air & Space" magazine bimonthly. " Smithsonian " and "Air & Space". "Smithsonian" magazine monthly and "Air & Space" magazine bimonthly.
Smithsonian Institution Smithsonian Institution Smithsonian Institution
Publications Publications Publications
 "Smithsonian" magazine monthly and "Air & Space" magazine bimonthly.  The Institution publishes "Smithsonian" magazine monthly and "Air & Space" magazine bimonthly. 
"Smithsonian" was the result of Secretary of the Smithsonian S. Dillon Ripley asking the retired editor of "Life" magazine Edward K. Thompson to produce a magazine "about things in which the Smithsonian Institution is interested, might be interested or ought to be interested". Another Secretary of the Smithsonian, Walter Boyne, founded "Air & Spac The Institution publishes "Smithsonian" magazine monthly and "Air & Space" magazine bimonthly. 
wiki:13494127
Smithsonian Institution [SEP] Publications
The Institution publishes "Smithsonian" magazine monthly and "Air & Space" magazine bimonthly. "Smithsonian" was the result of Secretary of the Smithsonian S. Dillon Ripley asking the retired editor of "Life" magazine Edward K. Thompson to produce a magazine "about things in which the Smithsonian Institution is interested, might be interested or ought to be interested". Another Secretary of the Smithsonian, Walter Boyne, founded "Air & Space." The Smithsonian Institute Press publishes books.