SPO] 



992 



[SPR 



Spottiswoode, William. 34. On the equations 

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35. On the sextactic points of a plane curve. 



Phil. Trans. CLV., 1865, pp. 653-669; Roy. 

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36. Address to the Mathematics and Physics 



Section of the BRITISH ASSOCIATION. Brit. 

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37. Note on the contact of curves. Quart. 



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38. Note on the resolution of a ternary 



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39. Note sur 1'equilibre des forces dans 



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4O. On the contact of conies with surfaces. 



Phil. Trans. CLX., 1870, pp. 289-308 ; Roy. 

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41. On some experiments on successive 



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42. Remarks on some recent generalizations 

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43. On the contact of surfaces. Phil. 



Trans. CLXIL, 1872, pp. 259-282 ; Roy. Soc. 

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 . 44. On optical phenomena produced by 



crystals submitted to circularly polarized light. 

 Roy. Instit. Proc. VIL, 1872, pp. 506-510; 

 Phil. Mag. XLIV., 1872, pp. 69-73. 



45. On the rings produced by crystals 



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 Roy. Soc. Proc. XX., 1872, pp. 333-335. 



46. On the old and new Laboratories at the 



Royal Institution. Roy. Instit. Proc. VIL, 1873, 

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47. On spectra of polarized light. Roy. 



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48. Note sur la representation algebrique 



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49. Sur les plans tangents triples a une 



surface. Paris, Acad. Sci. Compt. Rend. 

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Sprague, Philip S. Insect fauna of Camel's 

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Spratt, Thomas A. B. 20. On the bone caves near 

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Spratt, Thomas A. B. 21. On the undercurrent 

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Spreafico, Emilio, e Negri, G. Saggio sulla 

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Spree, Th., et Buse, L. H. Additamentum ad 

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Spreitzenhofer, G. C. 3. Botanische Erinner- 

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Sprengel, Hermann. 3. Ueber die Erkennung 

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 1864, pp. 188-191 ; Fresenius, Zeitschrift, III., 

 1864, pp. 115-117. 



4. Researches on the vacuum. Chem. Soc. 



Journ. III., 1865, pp. 9-21. 



5. On determining the weight of heteroge- 



neous liquids. Chem. Soc. Journ. IV., 1866, 

 pp. 455-462. 



6. Zur Geschichte der Wasser-Luftpumpe. 



Annal. Chem. Pharm. CLXVIL, 1873, pp. 62- 

 64 ; Phil. Mag. XLV., 1873, pp. 153-154. 



7. An air-bath of constant temperature 



between 100 and 200 C. Chem. Soc. Journ. 

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8. A method of determining the specific 



gravity of liquids with ease and great exactness. 

 Chem. Soc. Journ. XL, 1873, pp. 577-581 ; 

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9. On a new class of explosives which are 



non-explosive during their manufacture, storage, 

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Spring, Antoine Fr. For Biography, see Brux- 

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13. Observation relative aux rapports qui 



unissent le sens de temperature aux sensations 

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14. Les hommes d'Engis et les homines de 



Chauvaux. Bruxelles, Acad. Sci. Bull. XVIIL, 



1864, pp. 479-515. 



15. Sur les divers modes de formation des 



depots ossiferes dans les cavernes, a propos d'os- 

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1865, pp. 417-430; Ann. Sci. Nat. IV., 1865 

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16. Sur une tete de Castor trouvee a Donck 



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 Spring, JValthere. Quelques faits pour servir a 

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