VI CONTENTS. 
EXECUTIVE COMMITTEE AND BOARD OF REGENTS. 
Page. 
Report of Executive Committee. ......---..-------------+---------:---- see 92 
Proceedines of Board of Regents: 2.2 .\as os... 2 ccs 2c = oe tne ae pie 96 
GENERAL APPENDIX. 
The gyrostatic compass, by H. Marchand.....-...-.. Pa arches Sal eae em a) 
Radiotelesraphy, by G. Marcend. #-ho-8 se noe cere el eine or ear 117 
Multiplex telephony and telegraphy by means of electric waves guided by 
SWAICH IN GEOL!) Ohi SGUMET Se = else rae eile alates ela ee eterna ey eter etre eee 133 
Recent experiments with invisible light, by R. W. Wood...........--------- 155 
What electrochemistry is accomplishing, by Joseph W. Richards.........--- 167 
Ancient and modern views regarding the chemical elements, by William ire 
See ed So) EE a Se eo eRe eee cor omocaereecmobae ee abc's: sso 2 183 
The fundamental properties of the elements, by Theodore William Richards. . 199 
The production and identification of artificial precious stones, by Noel Heaton. 217 
The sterilization of drinking water by ultra-violet radiations, by Jules Cour- 
Tif0) Es Sta ee Sisl SASERS ee a eee Aaa Cems MiriS Ab te aka eS 235 
The legal time in various countries, by M. Philippot ..................------ 247 
Some recent interesting developments in astronomy, by J. S. Plaskett........ 255 
iPic-acerortheearth: “by Ue JOl yc. os G2 soe wee cmsicieee oe sae weitere eee 271 
International air map and aeronautical marks, by Ch. Lallemand........-...- 295 
Geologic work of ants in tropical America, by J. C. Branner.............----- 303 
On the value of the fossil floras of the arctic regions as evidence of geological 
climates by Ax G. Nathorsts2i.25. 05 < fees 92 eggs eee ee oe eee 335 
Recent advances in our knowledge of the production of light by living organ- 
isms, ye Adexe MeDermottcs s.4: 3 2a2 sams Some oe aya rege eee 345 
Organic evolution: Darwinian and de Vriesian, by N. C. Macnamara. ......-- 363 
Magnalia nature: or the greater problems of Nelo: ey, by D’Arcy Wentworth 
PAGUIPSON 2282 8 Son. Sees oe doe SR ISO Rene a yao eee ener 379 
A history of certain great horned owls, by Charles R. Keyes. ..............-- 395 
The passenger pigeon, by Pehr Kalm (1759), and John James Audubon (1831). 407 
Note on the iridescent colors of birds and insects, by A. Mallock..........---- 425 
On the positions assumed by birds in flight, by Bentley Beetham. .........-- 433 
The garden of serpents, Butantan, Brazil, by S: Pozzi-....-.-----~-.-.-.-_-- 44] 
Some useful native plants of New Mexico, by Paul C. Standley.....-......- 447 
The tree ferns of North America, by William R. Maxon....... Ee aia e tence eee 463 
The value of ancient Mexican manuscripts in the study of the general develop- 
ment of writing by A lired Me Tozzers 2 ce oe ee ee ere ee ee 493 
The discoverers of the art of iron manufacture, by W. Belck...........--.--- 507 
iPhe-Kapyles'of north Africa, “by A “Wissauer: = oso. nate ei cose sete 523 
Chinese architecture and its relation to Chinese culture, by Ernst Boerschmann. 539 
The Lolos of Kientchang, western China, by A. F. Legendre............-.--. 569 
Phe physiology of sleep; by BiiLegendres 22253242. e cece. sek eee oe oe ee 587 
Profitable and fruitless lines of endeavor in public health work, by Edwin O. 
PORCAH NS RSS es CP ice oe pe ne eee EEE RS ee ere 603 
Factory sanitation and efficiency, by C.-E. A. Winslow................------ 611 
The physiological influence of ozone, by Leonard Hill and Martin Flack...... 617 
Traveling at high speeds on the surface of the earth and above it, by H. S. 
Hel e=Sbraiwn 5 3 via is ohne caw saeco oie es ee 629 
Robertimoch, 1843-1910 "by-C. Mr heen ee ee ee ee 651 
Sir Joseph Dalton Hooker, 1817-1911, by Lieut.-Col. D, Prain..... eon gaa 659 
