How many years between editions?

The time frame in between editions vary.

I searched WorldCat http://www.worldcat.org/

and found that the 10th ed. was published in 1959.

http://www.worldcat.org/title/all-new-fannie-farme...

The Bartelby site (which includes the full text of the 1918 ed.) says they chose that edition because it was the last edited completely by Fannie Farmer. http://www.bartleby.com/87/

Here's a page from the Michigan State Univ Library digital collection which indicates that the 6th ed. was 1936 and the 8th ed. was published in 1946.

http://digital.lib.msu.edu/projects/cookbooks/html...

So there are a few clues. My guess would be that the 7th edition was published in 1940 or 1941 - probably before the U.S. got involved in WWII. If you'd like further assistance researching this, I would recommend contacting your local library.

Library chat service examples:

http://www.provlib.org/resources/ask/default.html

http://www.nypl.org/ask-nypl

http://www.askmn.org/

Editions are done on an annual basis, could be from each year to each 10 to each 50 and so on... You get the point here, it is a wide range, the only way to tell is by checking the year between the one you have and a previous or newer version.

you may look at here

http://prameg.info/

http://newal3ab.com/