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A number of consignments of evaporated apples from the west- 

 ern part of New York State to Germany, were rejected by the 

 Custom House chemists of that government, on account of the 

 presence of zinc. An analysis by W. P. Cutter of a similar 

 sample showed in one kilogram of the apples 0.583 grams of zinc. 

 The zinc came from the pans used in the process of evaporation. 



The analytical work done in this laboratory is not only con- 

 trolled by duplicate determinations, but in many cases with addi- 

 tional analyses of standard substances simultaneously carried on. 

 In the case of nitrogen, with every eight determinations, one de- 

 termination is made using a standard ammonium chloride. With 

 phosphoric acid and potash the results are checked in like manner. 

 The little time that is unoccupied with the work of the station is 

 spent in the comparison of analytical methods, with their special 



bearing on agricultural chemistry. 



HARRY SNYDER. 



