Papers 



Page 



34. The 1893 Duryea Automobile 1 



Don H. Berkebile 



35. The Borghesi Astronomical Clock 29 



Silvio A. Bedini 



36. The Engineering Contributions of Wendel Bollman 77 



Robert M. Vogel 



37. Screw-Thread Cutting by the Master Screw Method Since 1480 105 



Edwin A. Battison 



38. The Earliest Electromagnetic Instruments 121 



Robert A. Chipman 



39. Fulton's "Steam Battery" : Blockship and Catamaran 137 



Howard I. Chapelle 



40. History of Phosphorus 177 



Eduard Farber 



41. Tunnel Engineering — A Museum Treatment 201 



Robert M. Vogel 



42. The "Pioneer" : Light Passenger Locomotive of 1851 241 



John H. White 



43. History of the Division of Medical Sciences 269 



Sami Hamarneh 



44. Development of Gravity Pendulums in the 19th Century 301 



Victor F. Lenzen and Robert P. Multhauf 



