ARCHEOLOGY — BIBLIOGRAPHY. 289 



founded in 475 A. D. or possibly 22 years earlier, and Los Higos was 

 established shortly afterward, 510 A. D. 



Although it has been impossible to date either Paraiso or Rio Ama- 

 rillo exactly, both are certainly referable to the same general period on 

 styhstic grounds, and we may accept the great extension of Maya 

 dominion in the south as having taken place toward the close of the 

 fifth centmy, beginning about 475 A. D. 



The frontiers of Maya esthetic influence doubtless overlapped the 

 frontiers of actual empire in most places. For example, the pottery of 

 the Ulua Valley, which lies considerably east of this chain of cities, 

 shows unmistakable Maya influence. Also, during the present field 

 season a large collection of pottery from northwestern Salvador was 

 found to contain many pieces almost exactly like those from the Copan 

 tombs. Just as Rome influenced the life and art of the outer barba- 

 rians, so the Maya coerced the life and art of surrounding peoples of 

 lower cultm-e and imposed their esthetic standards and practices 

 beyond the frontiers of their empu-e. The latter would appear to have 

 been the chain of cities just described, whereas the former were 

 strongly felt as far east as the Ulua Valley. 



A second trip was made in Salvador and the central part of Hon- 

 duras during July and August. Mr. Held made color drawings of the 

 painted vases in the Justo Armas collection in San Salvador; and at 

 Tegucigalpa he painted a magnificent specimen of Maya ceramic art 

 from Copan. At San Pedro Sula a fine example of painted ware in the 

 Waller collection from the Ulua Valley was also drawn in color. At 

 Tegucigalpa occasion was taken to call upon His Excellency President 

 Bertrand and Doctor Mariano Vasquez, the Minister of Foreign Rela- 

 tions, and to explain the work of the Carnegie Institution of Washington 

 in Honduras , particularly at Copan . Friendly relations were established 

 with these officials, and it is believed that the way was paved for more 

 extensive work there in the future. 



BIBLIOGRAPHY. 



Garrison, Fielding H., Army Medical Museum, Washington, District of Col- 

 umbia. Preparation and publication of the Index Medicus. (For pre- 

 vious reports see Year Books Nos. 2-15.) 



The Index Medicus for 1916 contains 830 pages as against 1,448 

 pages for 1913, 1,311 pages for 1914, and 1,011 pages for 1915, a loss 

 of 618 pages (over 42 per cent) of bibliographical material in two 

 years of the war period. The average annual loss from August 1914 to 

 August 1917 is 537 pages or 37 per cent. The index for 1916 contains 

 152 pages as against 233, 215, and 170 pages for 1913, 1914, and 1915 

 respectively. German medical hterature has not been fully accessible 

 since the beginning of 1915, but through the courtesy of the American 



