Show Celluloid Models In In construction f great engineering works such as bridges un and darns durns It has been the custom to construct replicas sometimes resting costing many ot of dollars which are destroyed In the tests made upon It to determine the capacity capacH ot of the structure to resist the strain strow that Is likely to be put upon It I In service By u devised d by George GeUl-ge I E. E Beggs ot of university now etude mue In eel eel- celluloId are tested lu Iu Mercury III 1 lu and the same information it If scented at u greatly decreased expenditure |