IV 



CONTENTS. 



Land Magnetic Obsebvations, 1911-13 Continued. 



Observers' field reports Concluded. page 

 C. C. Stewart, on magnetic work in Brazil, Peru, and 



Bolivia, June 1910 to July 1911 125 



E. N. \Vebb, on magnetic-survey results obtained 



by Australasian Antarctic Expedition, 1911-1913. . 127 



Synopses of additional magnetic surveys, 1911-1913: 



H. E. Saw-yer, and W. F. Wallis 128 



Descriptions of Stations 129 



Africa 130 



Algeria 130 



Algerian Sahara 131 



Anglo-Egyptian Sudan 133 



British South and Central Africa 133 



Eg5-pt 133 



Eritrea 133 



French West Africa 133 



Gambia 136 



Liberia 136 



Morocco 136 



Nigeria 137 



Portuguese Guinea 137 



Rio de Ore 137 



Sierra Leone 137 



TripoUtania 138 



Tunisia 138 



Asia 138 



China 138 



India 140 



Indo-China 140 



Siam 141 



Turkish Empire 142 



Australasia 142 



Australia 142 



New Zealand 160 



Europe 160 



Bulgaria 100 



Crete 161 



Great Britain 161 



Greece 161 



Italy 162 



Malta 162 



Serbia 162 



Spain 162 



Turkish Empire 162 



North America 163 



Canada 163 



Central America 165 



United States 165 



South America 166 



Argentina 106 



Bolivia 167 



Brazil 107 



Chile 170 



Colombia 172 



Ecuador 172 



Guiana 172 



Paraguay 172 



Peru 173 



Uruguay 177 



Venezuela 177 



Islands, Atlantic Ocean 179 



Canary Islands 179 



Falkland Islands 180 



St. Helena 180 



West Indies 180 



Islands, Indian Ocean 180 



Ceylon 180 



Java 180 



Mauritius 181 



Islands, Pacific Ocean 181 



Fiji Islands 181 



Macquarie Island 181 



Philippine Islands 181 



Samoan Islands 181 



Land Magnetic Observations, 1911-13 Concluded. 

 Descriptions of Stations Concluded. 



Islands, Pacific Ocean Concluded. page 



Society Islands 181 



Antarctic Regions 182 



Victoria Quadrant 182 



Reports on Special Researches. 

 Research Buildings of Department of Terrestrial Mag- 

 netism, by L. A. Bauer and J. A. Fleming 185 



Introductory remarks 185 



Site 186 



Main building (headquarters and laboratory) 187 



.Standardizing magnetic obser\'atory 199 



Accessory structures 200 



Magnetic inspection trip and observations during total 

 solar eclipse of April 28, 1911, at Manua, Samoa, 



by L. A. Bauer 201 



Purpose and equipment 201 



Trip to eclipse station 202 



Solar observations on April 28, 1911 204 



Magnetic observations on April 28, 1911 207 



Magnetic inspection trip 207 



Results of comparisons of magnetic standards, 1905- 



1914, by L. A. Bauer and J. A. Fleming 211 



Explanatory remarks 211 



No. 1. AgincourtObservatory.nearToronto, Canada 213 

 No. 2. Algiers Observatory, Bouzareah, Algeria. . . . 217 

 No. 3. Alibag Observatory, near Bombay, India. . . 219 

 No. 4. Antipolo Observatory, near Manila, Philip- 

 pines 222 



No. 5. Athens Observatory, Athens, Greece 223 



No. 6. Batavia Obser%'atory, Java 224 



No. 7. Cheltenham Observatorj', Maryland 226 



No. 8. Christchurch Observatory, New Zealand . . . 229 



No. 9. Dehra Dun Observatory, India 231 



No. 10. Falmouth Observatory, England 233 



No. 11. Havana Observatory, Cuba 234 



No. 12. Helwan Observatory, near Cairo, Egypt. . . . 235 



No. 13. Hongkong Observatory, China 238 



No. 14. Kew Observatory, England 240 



No. 15. Mauritius Observatory, Mauritius 243 



No. 16. Melbourne Observatorj', Australia 245 



No. 17. Pilar Observatory, Argentina 245 



No. 18. Pola Observatory, Austria 248 



No. 19. Porto Rico Observatorj', Vieques, Porto Rico 249 



No. 20. Potsdam Observatorj', Germany 250 



No. 21. Rio de Janeiro Observatory, at Va.ssoura3, 



Brazil 253 



No. 22. Rome Observatory, Italy 254 



No. 23. Samoa Observatory, at Apia, Upolo 256 



No. 24. Tashkent Observatorj', Asiatic Russia 258 



No. 25. Tifiis Observatory, Karsani, European 



Russia 258 



No. 26. Tokio Observatory, Japan 260 



No. 27. Washington, D. C, Department of Terres- 

 trial Magnetism 262 



Nos. 28 and 29. Zikawei and Lukiapang Observa- 

 tories, China 264 



No. 30. Specimen field comparisons 267 



No. 31. Various additional observatories 269 



Reduction to international magnetic standards 270 



Improvement of standards for declination and 



horizontal intensitj' 271 



Improvement of inclination standard 272 



Regarding the constancy of magnetic standards . . 273 



Explanations of Tables .4, B, and C 275 



What are the international magnetic standards?. . 276 



Concluding Remarks 277 



Table A. Summary of results of direct comparisons 



of magnetic observatorj' standards 278 



Table B. Summary of preliminary results of indirect 



comparisons of magnetic observatory standards . 27S 

 Table C. Corrections on I. M. S. of the magnetic 



standards at Kew, Potsdam, and Washington. . 278 



