Encyclopaedia Britannica Plans 1st Major Change in 200 Years
Encyclopaedia Britannica drops its current design and is coming out in new form, first major innovation in more than 200 yrs; plans for new version were in progress for about 25 yrs; first new complete set due Feb 22, with official publication date in mid‐March; will be a three‐part work consisting of a Propaedia, a Micropaedia and a Macropaedia; Britannica planning dir Mortimer J Adler comments; comment on Britannica history (M)