Now Use For X-rays

It is said that the X-rays ulive been iuccessfully applied in France to th letection of adulteration'j of food. vhere the adulterants consist of some kind of mineral matter. The food to kï examined is reduced to powder and ipiead thinly upon gla ss. An X-ray jhotograph of the glï.ss reveáis the ■■.resence of the mineral partióles by ne failure of the ts ys to penétrate (hem as they penetraíe the other conátituents of he powd ered' food.