Mt Sinai Hospital Reports . ic acid, and then transferred to an Erlen-meyer flask. From this point onward, the same method is employed. In the presence of large amounts of iron an aliquot part of thesubstance to be examined should lie employed. It is advisable totest the reagents—hydrochloric acid, ammonium for their iron contents by making up a test solution in theproportions employed in the original method described above. Anycoloration resulting is determined by comparing the same with asolution of ferric chloride, made up to the same tint. The correctionthus determine
Mt Sinai Hospital Reports . ic acid, and then transferred to an Erlen-meyer flask. From this point onward, the same method is employed. In the presence of large amounts of iron an aliquot part of thesubstance to be examined should lie employed. It is advisable totest the reagents—hydrochloric acid, ammonium for their iron contents by making up a test solution in theproportions employed in the original method described above. Anycoloration resulting is determined by comparing the same with asolution of ferric chloride, made up to the same tint. The correctionthus determined is added to the scale of the standard solution. Forexample, if a correction of is found, the scale of the standard of2U will be set at , while from the reading on the other will be deducted. The formula given above will still apply. These determinations can be readily completed within an method is therefore very convenient for the study of metabolicchanges in which iron plays an important ON SIX CASES OF MALIGNANT Alfred Meyer, M. D., ATTENDING PHYSICIAN. In making a study of the following six eases of malignant endo-carditis I have had a considerable hesitancy as to how to designatethem. In spite of a few interesting differences which will be com-mented upon later, there are clinically many points of resemblanceand they belong to a class of cases which for many years has beendesignated as ulcerative endocarditis. My first intention was to callthem all malignant bacterial endocarditis. Firstly, because theywere malignant in their course and ended fatally, with septic symp-toms more or less acute and pronounced; secondly, because I believethe evidence is strong that they were all of bacterial origin, yetbacteria were present in the blood cultures of only three of two the blood cultures were negative and in one, unfortunately,no blood culture was made, and no post mortems were obtained inthe cases with negative findings
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