Published by Government Printing Office, Washington, DC, 1872
First Edition
Soft cover. Condition: Good. No Jacket. First Edition. RARE copy of this 70 page, illustrated work on "directions originally drawn up for the use of the observers in correspondence with the Smithsonian Institution, by Professor Guyot of the College of New Jersey, Princeton, and now reprinted with a series of additions for more general distribution". spine strip is worn; cover is faded and has light rub marks. Book.