first edition Softcover
by Killeffer, D.H.
First Edition. Softcover. 8vo, 8 pages; G-; no cover, peripheral tanning, small tears along top edge and bottom edge, some rubbing and spotting, vertical center crease throughout, small tears at center of bottom edge and top edge throughout, mild bumping to all corners; interior clean but for slight spotting, paper age-toned; "Reprinted from Industrial and Engineering Chemistry, Vol. 17, No. 8, page 820, August, 1925." 1293607. Rockville Non-Retail Listings. (Inventory #: 1293607)