Elements of Tachygraphy by David Philip Lindsley. Eleventh Edition. Otis Clap & Son. 3 Beacon Street, 1885.
Lindsley's manual on tachygraphy offers a comprehensive guide to the study of shorthand writing. With clear instructions and exercises, this book is an excellent resource for anyone interested in the history of writing and literacy. The system of brief writing, explained in the following pages. Was mainly developed during the years 1857 to 1862. The delay in its publication has contributed somewhat to its perfection. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

Otis Clapp & Son, Inc. is one of the country's oldest pharmaceutical manufacturers. It was founded in 1840 by Otis Clapp, a publisher, State House representative, Federal Tax collector, and one of the founders of M.I.T.
In addition to pharmaceuticals, the company began the manufacture of laboratory equipment related to medicine and bacteriology. In the mid-20th century, it became an innovator of equipment for the dispensing of medications. SInce the late 20th century, it has specialized in non-prescription medications, particularly for the workplace.
In 2008, Otis Clapp and Buffington were acquired by Medique Inc