This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!
Magnificent but Flawed Observatory Instrument
A historical account describes a large Speaking pips device with a turning joint dividing into two branches feeding a main pipe. It explains how observers may record data via a mounted table and a peaking pipe, aided by a powerful timepiece. The instrument magnifies over 6000 times, the largest built, yet is treated as a toy as maintaining its true figures proves impossible and Dr. Herschel’s discoveries are noted.
MENTIONED IN THIS ARTICLE
Therman
Ieee
Shelton
Hersehet