108 ANNUAL REPOET SMITHSONIAN INSTITUTION, 1913. 



The fundamental properties of the elements. By Theodore William Richards. 



17 p. (Publ. 2102.) 



The production and identification of artificial precious stones. By Noel Heaton. 



IS p., 3 pis. (Publ. 2103.) 

 The sterilization of drinking water by ultra-violet radiations. By Jules Cour- 



niont. 11 p. (Publ. 2104.) 

 The legal time in various countries. By M. Philippot. 8 p. Map. (Publ. 



2105.) 

 Some recent interesting developments in astronomy. By J. S. Plaskett. 16 



p. (Publ. 2106.) 

 The age of the earth. By J. Joly. 23 p. (Publ. 2107.) 

 International air map and aeronautical marks. By Ch. Lallemand. 8 p. (Publ. 



2108.) 

 Geologic vpork of ants in tropical America. By J. C. Branner. 31 p., 1 pi. 



(Publ. 2109.) 

 On the value of the fossil floras of the arctic regions as evidence of geological 



climates. By A. G. Nathorst. 10 p. (Publ. 2110.) 

 Recent advances in our knowledge of the production of light by living organ- 

 isms. By F. Alex. McDermott. 18 p. (Publ. 2111.) 

 Organic evolution ; Darwinian and de Vriesian. By N. C. Macnamara. 16 



p. (Publ. 2112.) 

 Magnalia naturae; or the greater problems of biology. By D'Arcy Wentworth 



Thompson. 15 p. (Publ. 2113.) 

 A history of certain great horned owls. By Charles R. Keyes. 11 p, 8 pis. 



(Publ. 2114.) 

 The passenger pigeon. By Pehr Kalm (1759) and John James Audubon (1831). 



18 p., 1 pi. (Publ. 2115.) 



Note on the iridescent colors of birds and insects. By A. Mallock. 8 p., 3 pis. 



(Publ. 2116.) 

 On the positions assumed by birds in flight. By Bentley Beetham. 7 p., 8 pis. 



(Publ. 2117.) 

 The garden of serpents, Butantan, Brazil. By S. Pozzi. 6 p. (Publ. 2118.) 

 Some useful native plants from New Mexico. By Paul C. Standley. 16 p., 



13 pis. (Publ. 2119.) 

 The tree ferns of North America. By William R. Maxon. 29 p., 15 pis. ( Publ. 



2120.) 

 The value of ancient Mexican manuscripts in the study of the general develop- 

 ment of writing. By Alfred M. Tozzer. 14 p., 5 pis. ( Publ. 2121. ) 

 The discoverers of the art, of iron manufacture. By W. Belck. 15 p. (Publ. 



2122.) 

 The Kabyles of north Africa. By A. Lissauer. 16 p., 12 pis. (Publ. 2123.) 

 Chinese architecture and its relation to Chinese culture. By Ernst Boersch- 



mann. 29 p., 10 pis. (Publ. 2124.) 

 The Lolos of Kieutchang, western China By A. F. Legendre. 18 p., 4 pis. 



(Publ. 2125.) 

 The physiology of sleep. By R. Legendre. 16 p. (Publ. 2126.) 

 Profitable and fruitless lines of endeavor in public health work. By Edwin O. 



Jordan. 8 p. (Publ. 2127.) 

 Factoi-y sanitation and efficiency. By C.-E. A. Winslow. 6 p. (Publ. 2128.) 

 The physiological influence of ozone. By Leonard Hill and Martin Flack. 



12 p. (Publ. 2129.) 

 Traveling at high speeds on the surface of the earth and above it. By H. S. 



Hele-Shaw. 21 p. (Publ. 2130.) 



