The Mechanics' Fair which we annonnced as the first to be held in the Golden State, was a decided success industrially and pecuniarily. The show of articles was in every way creditable, and the receipts amounted to $19,275 against expenses of about $11,000. The following is given as a list of California inventions, many of which were the result of much experiment and ingenuity : Breech-loading gun;. beam engine, driven by weight; bridge models ; brick-making do.; coffee-pot ; can, non-evaporating ; cooperage machinery ; elastic hose ; fly-killers ; fire and steam regulators ; gas and gas works ; graduating bit ; gear-cutting machine ; lard lamp ; locks ; lamp reflectors ; mineral oil, from schist ; meat chopper ; neutralizing valve slide for steam engines ; ox shoes, improved; planing machine; quartz crusher, togglejoint; quartz machine; rifles, double-barrel; self-conpling for cars ; soap, from soap-root ; 8elf-opening and shntting gate ; sluice-forks ; stoves and piping ; safe-locks and alarm safe ; sash balance ; specie boxes ; steam alarm ; telegraph, spiritual ; vaccinator ; wind-mills; washing-fluid ; water elevators; yacht rig, improved.