532 WILLIAM AUGUSTCrS NORTON. 



Terrestrial Magnetism American Journal of Science, Second Scries, Vol. IV. 

 Periodical Variations of the Declination and Directive Force of the Magnetic 

 Needle. American .Journal of Science, 1855. 

 Ericsson's Caloric Engine. American Journal of Science, 1853. 

 Donati's Comet, two memoirs. American Journal of Science, 1859 and 18G1 

 Molecular Physics, two memoirs American Journal of Science, 1804 and 



1872. 

 Principles of Molecular and Cosmical Physics. American Journal of Science, 



1870. 

 The Corona seen in Total Elipses of the Sun. American Journal of Science, 



1870. 



Physical Constitution of the Sun. American Journal of Science, 1871. 



Dynamical Tlieories of Heat. American Journal of Science, 1873. 



Laws of the Deflection of Beams exposed to a Transverse Strain, tested by 

 Experiment. Proceedings of American Association, 1870. 



Physical Theory of the Principle of the Lever Proceedings of American 

 Association, 1870. 



Results of Experiments on the Set of Bars of Wood, Iron, and Steel, after a 

 Transverse Stress. Two papers read before the National Academy of Sci- 

 ences (April, 1874, and April, 1875). A succinct statement of the general 

 conclusions of tlie two papers publislied in the American Journal of Science, 

 April, 187G. 



Results of Experiments on Contact Resistance. Read before National 

 Academy of Sciences, April, 187G ; published in American Journal of Science, 

 June, 187G. 



The above list sufficiently indicates the scope and character of Pro- 

 fessor Norton's scientific labors. Those of them which pertain to 

 engineering sulyects are valuable contributions to the science of which 

 he was so long a teacher. His investigation of Ericsson's Caloric 

 Engine was thorough and masterly. Made at a time when extrava- 

 gant expectations were widely entertained with regard to the new 

 motor, his conclusions, expressed in the paper of 1853, are referred 

 to and qnotod to-day as one of the best exjiositions'of the true nature, 

 character, and future of the hot-air engine. 



His experiments upon the set and transverse strength and deflection 

 of bars of wood, iron, and steel, constitute an important and valuable 

 addition to engineering science. The experiments were conducted 

 with care and skill, and the value of the results has since been re- 

 peatedly acknowledged, and the results themselves incorporated into 

 standard text-books. These papers are clear, precise, and definite 

 both in statement and description, — qualities characteristic of all of 

 Professor Norton's work, whether in or out of the class-room. 



Of his numerous contributions to the American Journal of Science, 

 comprising some of the most earnest work of his life, that journal 

 speaks as follows (November, 1883) : — 



