New “Calomel Free” pH and Reference Electrodes from Sensorex offer the high performance levels of calomel electrodes without the hazardous mercury associated with the design. The mercury-free ...

Knight Optical, the leading supplier of on-spec, metrology-tested optics, is proud to announce that it now offers a new range of high-spec components, Calomel Infrared (IR) Polarisers. In this ...

THE present shortage of potassium makes it necessary that chemists should take every care that there is no undue waste of this material, and it seems to us that with the large number of workers using ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...