|SWIGERT´S LUNAR TELLURIAN|
Swigert´s Lunar Tellurium was sold by Central School Supply House in Chicago. The manual to the instrument, and most probably the instrument itself, was published in 1894.
The Telluric Manual was written by one B. S Lobdell, M.S.
The Swigert Lunar Tellurium 1894
An earlier or later Swigert Lunar Tellurium?