70 ANNALH NEW YORK ACADEMY OF SCIENCES 



Spencer, J. W. : "On the geological relationship of the volcanics of the West 

 Indies." Victoria Inst. Jour. Trans., vol. 35, pp. 189-207, 1 fig. 1903. Dis- 

 cusses physiographic features and changes of the West Indies and the 

 submerged platform upon which they rest, place of their igneous forma- 

 tions in geological history, etc. 



Vaughax, T. W. : "Earliest Tertiary Coral Reefs in Antilles and United States." 

 (Abstract.) Read before Geol. Soc. Wash. Feb. 26, 1902. Touches on 

 coral reefs of Porto Rico being in part of Oligocene age. No Miocene 

 reefs, because in Miocene Antilles stood at higher level than now. Plio- 

 cene reefs in Florida and Antilles. 



Whartox, W. J. L. : "Depth of the Ocean near Porto Rico." Geog. Jour., vol. 

 4, p. 255. Sept., 1894. The physical condition of the ocean. 



WiLsox, Herbert M. : "Water resources in Porto Rico." Water supply paper 

 No, 32, U. S. Geol. Surv. 1899. An excellent discussion of the physical 

 features. Contains many good illustrations and two maps with reconnois- 

 sance contours. 



: "The Engineering Development of Poito Rico." Eng. Mag., vol. 17, 



])p. 602-621. July. 1S99. 



: "Porto Rico, its Topography and Aspects." (With map.) Bull. No. 



32, Amer. Geog. Soc, pp. 220-238. 1900. A good description of the physical 



features, climate and productive industries. 

 Author unknown : "Porto Rico, its Natural History and Products." Scien. 



Am. Suppl., vol. 46. July 30, 1898. No author mentioned — good general 



account, including report on geology and mines. 

 Author unknown : "Zur Kenntniss der Insel Puerto Rico." Geographische 



Gesells. Ham. Mett. 1899-2, pp. 217-236. 

 Author unknown : "North American and West India Gazetteer." London, 



printed for G. Robinson, 1778 (6) xxiv, 216 pp. Situation, climate, soil, 



produce trade — bays, rivers, lakes, mountains, number of inhabitants, etc. 



Maps. 2d edition. 



