A glass has certain dispositions, for example the disposition to shatter when struck. But what is this disposition? It seems on the one hand to be a perfectly real property, a genuine respect of similarity common to glasses, china cups, and anything else fragile.
The first saddle is believed to have been invented in 365 AD by the Sarmations. Proud horsemen who used their horses in battle and also sacrificed them to the gods, their saddle creations were brought back to Europe by the Huns.
All-purpose saddles combine aspects of both, to be used for straight riding as well as jumping. In English riding, the tack is different as well. For one, the reins are meant to be held in both hands, to give the rider more control over the various movements and jumps the horse may be required to do.