Boart Longyear diamond drilling firm; Brainard-Kilman, a maker of civil engineering devices, such as well monitoring and test equipment; and ChemGrout a mfg of cement grouting equipment. Longyear acquired Slope Indicator Company, the nation's largest producer of geotechnical instruments, and Northern Air Supply in 1988, followed by the Campbell Pacific Division in 1989 and WTD Environmental Drilling in 1990. Then in 1994, North Star Drilling Company, specializing in sonic drilling was acquired. On January 2, 1995, Boart International and the Longyear Company officially merged into a single company and changed its name to Boart Longyear Limited. At this point the two companies
Pierre Edmond Teisserenc de Bort Pierre Edmond Teisserenc de Bort Pierre Edmond Teisserenc de Bort (17 September 1814 at Châteauroux – 29 July 1892 in Paris), was a French writer and politician. He entered the civil service after the completion of his education at the École Polytechnique. He was a railway expert, becoming secretary-general of the Railway Commission established in 1842, government commissioner to the authorized railway companies, administrator of the Lyon-Mediterranean railway, and commissioner to examine foreign railways. In 1846 he was returned to the Chamber of Deputies for Hérault, but the revolution of 1848 drove him into private life, from which he only