A Survey History of the American Spring-Driven Clock 1840-1860 - No. 9 Supplement No. 9 to the NAWCC BulletinBy D. H. Shaffer, Ph.D., c. 1973Cover and front matter3-11 10-16 17-22 23-28 29-34 35-40 41-46 47-52 53-58 59-64 65-70 71-76 77-82 83-88 89-94 95-100 101-end
