Hastings-on-Hudson, NY and MA: David & Yola Coffeen and Raymond V. Giordano 1996. First Edition. Pgs 65-96. 8vo. Wraps. Illustrated. A bright clean copy. Fine. Staplebound wraps. 
The Bohnenberger Electroscope by BERYL CLOTFELTER.
The Introduction of the Elongating Glass on Sextants by WILLEM F.J. MÖRZER BRUYNS.
American Instruments at the Adler by BRUCE STEPHENSON.
American Parallel Rules: Invention on the Fringes of Industry by PEGGY A (Aldrich) KIDWELL.
The Rittenhouse Journal of the Scientific Enterprise was a scholarly journal focused on increasing and distributing knowledge about scientific instruments made and/or sold in the US and the Americas. Throughout its 23 years of publication (and a total of 70 issues), the journal covered areas including mathematical, optical and philosophical instruments, chemical, physical and electrical apparatus, sundials and globes; and time periods from the 17th to the mid-20th century. Authors of the various articles in the journal are well known scholars from major institutions, collectors, and dealers in the field of scientific instruments.