Scientific American Volume 23 Number 06 (August 1870)
Scientific American · 1870 · Internet Archive
‹ Scientific American Volume 23 Number 05 (July 1870)
Scientific American Volume 23 Number 08 (August 1870) ›
Read this issue as text (for screen readers and slow connections).
From the Internet Archive; it states no licence. Its page at the Internet Archive.















