IN two previous papers, 1 I have mentioned that water at ordinary temperature is not a suitable liquid for forming “liquid drops floating on the same liquid surface”. In August 1930 ...

Place about ½ teaspoon of each liquid in its labeled cup. On a stiff piece of paper, label three areas Water, Oil, and Corn syrup. Place the card in a zip-closing plastic bag and seal the bag. Using ...

It is not the first U.K. airport to drop the rule that has been in place ... their bags as they head through security—any dangerous liquids in baggage can be identified in seconds by the ...