Summary: THE death on January 21 at the age of ninety-six of Sir Guilford Lindsey Molesworth removes one whose name has long been a household word among engineers. To few it is given to become a leader in his profession, but Sir Guilford Molesworth not only rose to distinction and became the president of the Institution of Civil Engineers, but he also compiled a standard work of reference which has been carried into the remotest corners of the earth. Published first in 1862, his “Pocket Book of Engineering Formulas” passed through no fewer than twenty-four editions before 1900. A “Molesworth” was to be found in the pocket of practically every engineer, and its pages have been thumbed in many a difficult situation, knowing that its contents could safely be relied on.