758 



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 Erdm. Journ. 'Prak. Chem. LXXVL, 1859. 



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Sturgeon, William. 7O. An account of an 

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 Svanberg, Lars Fredrik : 

 To No. 2 add reference : 

 Erdm. Journ. Prak. Chem. X., 1837, pp. 



494-500. 



Swan, William. 17. On a new method of ob- 

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 1856, pp. 448-450. 



To No. 6 add reference : 



Astron. Soc. Mem. XXL, 1852, pp. 72-75. 

 Swinburne, Henry : 



To No. 1 add reference : 



Geogr. Soc. Journ. I., 1832, pp. 258-262. 

 Sylvester, Jame s Joseph. 113. On an extension 

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114. On a porismatic property of two conies 

 having with one another a contact of the third 

 order. Phil. Mag. XXXVII., 1850, pp. 438- 

 439. 



115. Demonstration of the theorem that 

 every homogeneous quadratic polynomial is 

 reducible by real orthogonal substitutions to the 

 form of a sum of positive and negative squares. 

 Phil. Mag. IV., 1852, pp. 138-142. 



