FROM recent X-ray measurements (Malkin, NATURE, Jan. 24, p. 126) it is claimed that the ethyl esters of fatty acids may have two forms of chain. An account of an investigation of several binary ...

Insects commonly use these chemicals as pheromones, but the pine sawyers make four very specific ones—ethyl palmitate, ethyl stearate, ethyl oleate and ethyl linoleate—and they do so in bulk.

IT has been found possible to concentrate inorganic ions from aqueous solutions, even if very dilute, by a flotation technique. The principle depends upon the use, as a collector, of a surfactant ...