Papers 



Page 



1 . The Scholfield wool-carding machines 1 



Grace L. Rogers 



2. John Dccrc's steel plow 15 



Edward C. Kendall 



3. The beginnings of cheap steel 27 



Philip W. Bishop 



4. The Auburndale Watch Company 49 



Edwin A. Battison 



5. Development of the phonograph at Alexander Graham Bell's Volta 



Laboratory 69 



Leslie J. Newville 



6. On the origin of clockwork, perpetual inoiioii devices, and the compass . 81 



Derek J. de Solla Price 



7. Mine pumping in Agricola's lime and later 113 



Robert P. Multhai'f 



8. The natural philosophy of William Gilbert and Ills jjredccessors .... 121 



W. James King 



9. Concstoga wagons in Braddock's campaign, 175.S 141 



Donald H. Berkebile 



10. Old English patent medicines in America 155 



George B. Griffeniiagen and James Harvey Young 



11. Why Bewick succeeded : A note on the history of wood engraving ... 185 



Jacob Kainen 



111 



