A proposal is herewith submitted to you for regulating, from this Observatory, the clocks of the Pennsylvania Central, and other railroads associated with it
by S. P. Langley, Allegheny Observatory
1869
Allegheny Observatory·1 editions
Loading Description
Tags
NewBookshelves
0 readersNo users with this book on their shelves. Maybe you could be the first.
Threads
0 discussionsQuotes
0 quotesReviews
0 reviewsNo reviews yet. Add your review.
Lists
0 listsNo lists containing this book.