 Wysłany: Sob 9:36, 12 Lut 2011 Temat postu: and
2. Had Stella been poisoned with arsenic |
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| willseepresently.Forobserve
whatfollows.Hairgrowsatauniformrate―roughlyafiftiethofaninch intwenty-fourhours.Itisconsequentlypossiblebymeasurementtofix nearlyexactlytheageofanygivenpointonahair.Thusifwehavea completehairandwefindatanypointinitadepositofarsenicby measuringfromthatpointtotherootwecanfixwithinquitenarrow limitsthe date on which that dose of arsenic was taken. But is it possible to do this? I asked. Notinthecaseofasinglehairhereplied.Butinthecaseofatress inwhichallthehairsareofthesameageitisperfectlypossible.Youwill see the important bearing of this presently. Toreturnnowtomyinvestigation.Ihadthebulkofacandleanda tress of Stella's hair The questions to be settled were 1. Was there arsenic in the candle? and 2. Had Stella been poisoned with arsenic? Ibeganbytrimmingthewaxmouldinreadinessforcastingandthen Imadeananalysisofthetrimmings.Theresultwasthediscoveryofcon- siderable quantities of arsenic in the wax. Thatansweredthefirstquestion.Nextasthetressofhairwaslarger thanwasrequiredforyourpurposeIventuredtosacrificeaportionofit forapreliminarytest.Thattestalsogaveapositiveresult.Thequantity ofarsenicwasofcourseveryminutebutstillitwasmeasurablebythe delicatemethodsthatarepossibleindealingwitha nike air jordan heels womenyilai: ugg boots clearance I confess he is a worthy foe |
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