DE CIENCIAS NATURALES 2$ 



807. Glacial Geology, jfames Geikie, 1891. 

 813. Quartz Fibers, C. V. Boys. 1891. 

 861. Some Applications of Physics and Mathematics to 



Geology, C. Chvee. 1893. 

 872. Some Difficulties in the Life of Aquatic Insects, 

 Pvof, L.C, Miall. 1893. 



890. Geological Change dináTime^Siv ArchihaldGeikie. 1893. 



891. Geological History of the Jellowstone National Park 

 and Soaping Geysers, Arnold Hague. 1893. 



892. Continental Problems of Geology, G.K. Gilbert. 1893. 

 — 897. Crystallisation, G. D. Liveing. 1893. 

 — 898. The Rejuvenescense of Crystals, Prof. John W. Judd. 



1893. 



938. The Problem of Flying and Practical Experiments 



in Soaring, Otto Lilienthal, 1894. 

 946. Geología Time, as indicated by the sedimentary 



Rocks of North America, Charles D. Walcott 1894. 

 •947. The Age of the Earth, Cháveme King. 1894. 

 954. The so-called Bugonia of the Ancients, and its Rela- 

 tion to Bee-Like Fly, Eristalis tenax, C. R. O sten Sac- 

 hen. 1894. 



1103. Earth-Crust Movements and their Causes, Joseph 

 Le Conté. 1898. 



mi. The biologic Relations between Plants and Ants, 



Dr. Heim. 1898. 

 •1137. Diamonds, William Crookes. 1898. 

 1140. Fluorine, Henvy Moissan. 1898. 



•1145. The Age of the Earth as an Abode fitted for Life, 

 Lord Kelvin. 1898. 



1199. Modification of the great Lakes by Earth Move- 

 ment, G.K. Gilbert. 1900. 



1200. The Plan of he Earth and its Causes, W. 

 Gregovy, 1900. 



1201. Funafatti: the Story of a Coral Atoll. W, J, 

 Solías. 1900. 



1202. Oceanography, M. J. Thoulet. 1900. 

 1209. The economic Status of Insects as a Class, L, O, 



Howavd, 1900. 



