34 Transactions Tennessee Academy of Science 



Kempe in the Cambridge Messenger of Mathematics, 1875 and 1876; 

 and for a more general mathematical treatment of the subject to 

 "Sur les Systemes de Tiges Articulees", par M. V. Liguine, in the 

 Nouvelles Annales, December, 1875. There are other sources of 

 information. 



Some months after this paper was prepared, the author's atten- 

 tion was called to an American publication on this subject entitled, 

 "Linkages: The Different Forms and Uses of Articulated Links", by 

 J. D. C. DeRoos. This book (one of Van Nostrand's Science Series) 

 was translated from Revue Universelle des Mines, and published in 

 1879. It can be obtained from the Van Nostrand Co. 



