The Collected Works of Count Rumford
Five Volume complete set
Cambridge, MA: Belknap Press of Harvard University Press, 1968-1970.
Hardcover. Five volume set bound in pale blue cloth with white lettering on spines. Each volume has black and white illustrations throughout. 
 
Vol. I: The Nature of Heat.  Vol. 2: Practical Apllications of Heat.  Vol. 3: Devices and Techniques.  Vol. 4: Light and Arament.  Vol. 5: Public Institutions
 
Condition notes:
Dust Jacket spines show heavy staining with a damp stain on bottoms of Volumes III, IV, and V.  Staining does not bleed through onto book below. Dust jacket of Volume I has two tears on the spine (~ 1/2" and 1" long). 
 
Under the dust jackets, the light blue cloth covered boards of books are clean with a few signs of light soiling. Varies per book. 
 
Heavy foxing on top of all closed pages. Inside, the book pages are crisp and clean and near-fine. Bindings are very good.