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| | Bausch & Lomb |
 | | Bausch and Lomb Optical Company (now just Bausch and Lomb, Incorporated), was founded in 1853 by John J. Bausch and Henry Lomb. |
 | | The company was renamed Bausch and Lomb but was known as the "Triple Alliance" and the new logo featured three prisms, each with the initials of the participating organizations: "B-L", "Z" and "S". |
 | | Bausch and Lomb concentrated its efforts on making rangefinders, gun sights, binoculars, trench periscopes, search light mirrors, optical glass and other materials for military use. |
| www.surveyhistory.org /bausch_&_lomb1.htm (444 words) |
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