ingrid70 wrote:If you look closely to words with an f in them, you'll see that there is a difference between the f and the long s, as it's called. The f has a cross-bar, the s doesn't. See here for more information
That f-looking thing, as Ingrid notes is an s. It was a long-standing bit of typographical convention in English and American printing for many years (possibly other places too, but I'm most familiar with American printing given my past career). I'd guess it was phased out in the early 19th Century. A pity as it is fun, but when hand-setting type there are only so many spaces for letters in a California case.