The U.S. Food and Drug Administration is warning pet owners that several samples of Darwin’s Natural Pet Products raw pet food tested positive for salmonella and listeria monocytogenes. However, the ...
C. J. Smithells and H. P. Rooksby in NATURE of Aug. 13, p. 226, concerning their own and Mr. F. S. Tritton's observations on sub-grain boundaries in tungsten and iron, it may be of interest to ...