The Mexican mining journal . t is the result of calculation must neverbe lost sight of. The greatest amount of care will not entirely elimin-ate discordant results due to variations in samples anderrors in analytical methods. For this reason the onlysafety lies in repetition and still more repetition. Theseerrors are quite as apt to creep in when operations areon a large scale as with small quantities of this reason ten small tests are better than onemil-run. It is best to determine one point at a time and re-peat that often enough so that there can be no doubtabout the correctnes
The Mexican mining journal . t is the result of calculation must neverbe lost sight of. The greatest amount of care will not entirely elimin-ate discordant results due to variations in samples anderrors in analytical methods. For this reason the onlysafety lies in repetition and still more repetition. Theseerrors are quite as apt to creep in when operations areon a large scale as with small quantities of this reason ten small tests are better than onemil-run. It is best to determine one point at a time and re-peat that often enough so that there can be no doubtabout the correctness of results. Then proceed to thenext step. Bear in mind that all samples are tracher-ous, those from one kilo operations as well as thosefrom a million ton mine, and that sampling is the basicoperation in all testing. Nitrate exports from Chile, South America, in Au-gust and September totaled 1,362,189 and 2,119,881quintals (1 quintal= lb.) respectively, against4,313,476 and 4,118,906 quintals for those months Transporting Sugar from the Mill to thi- Railroads in Vera Cruz. Courtciy Mexico View Co. March, 1915. THE MEXICAN MINING JOURNAL
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