I'm sure there must have been vast improvements since the early 1900's.
If memory serves me well, the glands used on subs at the time were actually a bit faulty, although I can't remember a source for that info.
I think maybe something I read about T Class boats in the RN during the 40's.
edit --
http://www.go2marine.com/productcenters/shaftseals/
I think glands are a thing of the past now.