There is nothing in the ancestry.com data base on a ship called Salmo. There are several listings for Anne Ljunggren including this one in May of 1910. This one indicates that this Anne is Swedish. Could you provide more information on what it is that you are looking for.
Name: Anna Ljunggren Arrival Date: 25 May 1910 Estimated Birth Year: abt 1882 Age: 28 Gender: Female Port of Departure: Liverpool, England Ethnicity/Race/Nationality: Scandinavian Ship Name: Carmania Search Ship Database: View the Carmania in the 'Passenger Ships and Images' database Port of Arrival: New York, New York
If you will enter the name of that ship in the search option from the main page of this website you can see that ship was only a regular feeder ship for Wilson Line which took passengers from Kristiania (Oslo) and Kristiansand, Norway to the port of Hull in England. Passengers finished their voyages to American on different trans-Atlantic ships.
You will find various articles available on this website that can explain that system in very great detail.
It would appear from this information that the Salmo transported passengers from Scandanavian cities to Hull in England whereupon the passengers transferred to other ships to travel to America..