A modified Boerner sampler . opened and swung clear of the opening,that the sample may fall through the opening in the hopper onto thepoint of the cone, where it slides over the entire surface of the cone A MODIFIED BOERNER SAMPLER. 7 in a shallow sheet and is divided into as many streams as there arespaces between the partitions at the base of the cone. As everyalternate stream falls into one pan, and the intermediate streams arediverted into the other pan. the sample will be divided into ap-proximately equal parts. In order to further divide the sample, itwill be necessary only to close the
A modified Boerner sampler . opened and swung clear of the opening,that the sample may fall through the opening in the hopper onto thepoint of the cone, where it slides over the entire surface of the cone A MODIFIED BOERNER SAMPLER. 7 in a shallow sheet and is divided into as many streams as there arespaces between the partitions at the base of the cone. As everyalternate stream falls into one pan, and the intermediate streams arediverted into the other pan. the sample will be divided into ap-proximately equal parts. In order to further divide the sample, itwill be necessary only to close the gate and pour the contents of oneof the pans—the lower pan will be found to be more convenient touse for this purpose—into the hopper, replace the pan, open the gate,and let that half of the original sample run through the deviceagain. This action can be repeated, pouring always from the samepan, until the quantity of the sample deposited in one pan is theamount desired for analysis. By various combinations, pouring from. PiQ_ 4.—A, Botton view of lower cylinder, showing spout at bottom of funnel andshield surrounding this spout. D, Bottom view, upper cylinder, showing bottom ofhopper with gate open. the same pan ever}^ time, as described, or by sometimes using theother, almost any desired size of sample can be obtained,^ providedthe entire contents of the pan being emptied are poured into the upperhopper each time. For instance, if the weight of the original sample is 1,000 grams,and it is desired to obtain approximately 30 grams for analysis, thesample should be poured through, or cut * as it is connnonly called,five times. The first cut starts with grams, giving 500 gramsin each pan; the second cut starts with 500 grams, giving 250 gramsin the pan just emptied, and 750 grams in the other; the third cut »U. S. Department of Agriculture Bulletin .574 will be found convenient for use ingrain grading in connection with this apparatus, as it contains tables of the co
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashingtongovtprin
