108 ANNUAL KEPOET SMITHSONIAN INSTITUTION, 1913. 



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



p. (Publ. 210G.) 

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

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



210S.) 

 Geologic work 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'Arey 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 Boerseh- 



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

 The Lolos of Kientchang, 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.) 

 Factory 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.) 

 Robert Koch. 1843-1910. By C. J. M. 8 p., 1 pi. (Publ. 2131.) 

 Sir Joseph Dalton Hooker, 1817-1911. By Lieut. Col. D. Prain. 13 p.. 1 pi. 



(Publ. 2132.) 



EefOTt for 1912. 



The report of the executive committee and proceedings of the 

 Board of Regents of the Institution, as well as the report of the 

 Secretary for the fiscal year ending June 30, 1912, both forming part 



