Albert B. Farnell was born in 1917. He was a mathematicians at
Princetion in the 40's and 50's. I am trying to find the year he died.

Dear mbhenry,

The database of deceased holders of Social Security Numbers knows only
one single Albert B. Farnell; and this person was born on 18 July
1917. Since it would be absolutely unlikely that this is only
coincidence, I am sure that he is the person you have in mind.

The Social Security Death Index gives 18 February 1994 as the date of
death for Albert B. Farnell; by the time he died, his place of
residence was Fort Collins, Colorado.


Sources:

RootsWeb: Social Security Death Index
http://ssdi.genealogy.rootsweb.com/


Hope this answers your question!
Regards,
Scriptor

Excellent.