owing to the great risks of send- 

 ing the members of the expedi- 

 tion over a dangerous mountain 

 trail, it was necessary to cut the 

 equipment down to any such 

 surgical instruments as might be 

 demanded, and it was not possi- 

 ble to take along any of the 

 equipment for making anthro- 

 pometric measurements. 



Finally, owing to the presence 

 of smallpox and an epidemic of 

 typhoid in Arma, Puquiura, and 

 the neighboring villages, the sur- 

 geon was obliged to stay with 

 the topographical party all the 

 time that they were working in 

 that region. Their work was 

 greatly hindered by adverse wea- 

 ther conditions, and so much val- 

 uable time was lost. 



The extent of the smallpox 

 and typhoid fever epidemics pro- 

 hibited the surgeon from carry- 

 ing on anthropological work 

 there, on account of the danger 

 of bringing the contagion to the 

 camp. To be sure, the white 

 members of the expedition had 

 been vaccinated, both for small- 

 pox and typhoid, by our medi- 

 cal adviser, Dr. H. S. Arnold, of 

 the Yale Medical School, before 

 leaving this country ; but it would 

 have been wrong to have had 

 them run unnecessary risks or 

 to have subjected to the danger 

 of contagion the muleteers, engi- 

 neering assistants, and the other 

 native members of the party who 

 ihad not been so vaccinated. 



IX 



WEATHER OBSERVATIONS 



From May 28, the day of our 

 departure from Panama, until 

 the arrival of the vessel off the 

 town of Mollendo, on June 8, a 

 full series of weather observa- 

 tions was taken daily at the 

 hours of 8 a. m., 12 m., and 8 

 p. m. The data recorded cover 

 the following phenomena : Air 

 temperature (dry-bulb thermom- 

 eter), temperature bv wet -bulb 

 thermometer, barometric pres- 



564 



