WE have received from Messrs. Oxo, Ltd. (Thames House, Queen St. Place, E.C.4), samples of metal caps for test-tubes. These caps have been used for some time in their laboratories, and Messrs. Oxo ...

I blow through the first steps of my experiment as fast as I can. Grousing to myself and frowning, moving fast between pieces of machinery, talking to no one. Screw off test-tube caps. Fumble with ...