496 MEMOIR OF DAXIEL TREADWELL. 



List of Professor Treadwell's Papers. 



1822. Improvements in Machinery*. North American Review, Vol. XIV. p. 14. 



1825. An Account of the Passage of Water through an Aqueduct being totally obstructed by a Col- 

 lection of Air. Boston Journal of Philosophy and Arts, Vol. II. 

 1825. Report on the Supply of Boston with Pure Water. 



1827. On a Mode of conducting the Transportation on Railways, and Arranging the Passing Places, 



to avoid the Necessity of a Double Set of Tracks. "Franklin Journal," Vol. IV. p. 278. 

 Paper dated August 22, 1827. 



1828. Report to S. C. Phillips, Benjamin Ilawkes, and Perley Putnam, Committee of the Directors of 



the Salem Milldam Corporation, April 20, 1X28. 



1829. Reports to the Directors of the Massachusetts Railroad Association on a Single Track. 



1833. Description of a Machine cjiUed a " Gypsej," for Spinning Hemp and Flax. Memoirs of the 



American Academy, 1833. 

 1835. Report on the Weights and Measures of the State of Massachusetts. 



1837. Report as Chairman of the Commission on the Supply of Boston with Pure Water. 



1838. Report as Chairman of same Commission on the same Subject. 



1812. Review : " Practical Treatise on Ventilation, by Dr. Morrill Wyman." North American Review, 



Vol. LXIII. 

 1845. A Short Account of an Improved Cannon. 



1855. Relations of Science to the Useful Arts. Delivered to the American Academ}-, November, 1852. 



1856. On the Practicabilit3' of the Construction of Cannon of great Calibre, capable of enduring long 



continued Use under full Charges. 



1860. On the Construction of Rifled Cannon. A Letter to Hon. John B. Floyd, Secretary of War. 



1861. On the Construction of Improved Ordnance, as proposed in a Letter to the Secretaries of the 



War and of the Navj-, and the Chiefs of the Bureaus of Engineers and of Ordnance of the 

 United States. 

 18GI. On the Measure of the Forces of Bodies moving with difll"ercnt Velocities. 



1863. On the Effect of Cannon Shot upon Iron-clad Ships and Armor Plates generallj-. Proceedings of 



American Acadcmj-, May, 18G3. 



1864. On the Construction of Hooped Cannon ; being a Sequel to the Memoir on the Practicabilit}' of 



the Construction of Cannon of great Calibre, etc. Memoirs of the Academy, Vol. VI., 1864. 

 1866. On the Comparative Strength of Cannon of Modern Construction. Proceedings of the Academy, 



Vol. VIL, 1866. 

 1868. Answer to Charges contained in an Article in the " Scientific American," October, 1867. 



A notice of Professor Treadwell's Papers, bj- the compiler of this Memoir, was printed in the Atlantic 

 Monthly, October, 1873, Vol. XXXII. p. 470. 



List of Inventions. 



Machine for making Wood Screws. Iron Tail for Laying Rope. 



Wrought-Nail Machine. Machinerj- for making Cannon and forming Hoops 



Foot Lever Printing Press. for Cannon. 



Power Printing Press. Recoil Apparatus. 



Injecting Timber with Preserving Fluids. Device for Firing Cannon. 



Circular Hatchel, or '• Lapper." Tubular Condenser for Steam Engines. 



Belted Roving Machine. Hot- Air Furnace Regulator. 



"Gj-psey." — Machine for Spinning Hemp or Flax. Improved Backsight of vai-iable Size for Rifles. 



Apparatus for Tarring Rope-j-arns. 



