Engraving: Watt's first experiment. Marcus Stone ARA pinxt; Herbert Bourne sculpt; published by Appleton & Co 1879
Commemorative spade used to turn the first sod of the River Lee Conservancy's new cutting through Horse Shoe Point 1878
Filings coherer, glass tube formed into T-shape at one end and bent round into U-shape at other end with bulb, 1899 1899