112 report of the secretary general,. 



Article 40. 



The Second Pan American Scientific Congress urges that — 



The American Republics in which yellow fever prevails or is sus- 

 pected of prevailing enact such laws for its eradication as 

 will best accomplish that result; 

 Inasmuch as yellow fever exists in some of the European colonies 

 in America, they be invited to adopt measures for its elimina- 

 tion. 



Article 41. 



The Second Pan American Scientific Congress recommends that — 



Such of the American Republics as have not already done so should 

 justify the international conventions concerning the white- 

 slave trade. 



Article 42. 



The Second Pan American Scientific Congress recommends that — 



There be established throughout the American Republics uniform 

 methods in the presentation of statistics, in the classification 

 of merchandise and in the manufacture thereof, in the stand- 

 ard of weights, measurements, and tests, in nomenclature and 

 specifications, in administrative customs regulations, and in 

 the schedules of port charges; 

 Provision be made for the collection and study of the data thus 

 made available, through some organization which will assure 

 a thorough and scientific comparative study of the questions 

 involved. 



Article 43. 



The Second Pan American Scientific Congress deems it advisable that — 



The American Republics agree upon a uniform date for the taking 



of the census, and that uniform methods be adopted in the 



collection, arrangement, and presentation of commercial and 



demographic statistics. 



Article 44. 



The Second Pan American Scientific Congress is of the opinion that — 

 It is highly desirable to make a scientific study of the systems of 

 taxation existing in the different American Republics. 



