I was wondering if anyone could tell me if there is much difference between the various editions/ impressions of Lloyd H, Hind's book Brewing; Science and Practice. The reason I ask this is an old guy who has helped me heaps with my brewing damaged his copy (a 1938 print i believe it is) and I thought it would be nice to repay his time in some small way. The only thing is I can only find 1948 editions. Thanks for any help.