. The Journal of laboratory and clinical medicine . Fig. 1.—Normal cells, 20 per cent suspension,and an equal part of normal heated Fig. 2.—Cells from a case of Hodgkins dis-ease, 20 per cent suspension, and an equal partof normal heated serum. (Case No. 15.) This figure also illustrates accurately the ap-pearance of normal cells mixed with unheatednormal serum. lection on account of the rapid deterioration which occurs at room tempera-ture. Equal parts of heated serum and cellular suspension Avere measured bya capillary pipette and mixed on a slide. From this mixture an ordinaryhangin
. The Journal of laboratory and clinical medicine . Fig. 1.—Normal cells, 20 per cent suspension,and an equal part of normal heated Fig. 2.—Cells from a case of Hodgkins dis-ease, 20 per cent suspension, and an equal partof normal heated serum. (Case No. 15.) This figure also illustrates accurately the ap-pearance of normal cells mixed with unheatednormal serum. lection on account of the rapid deterioration which occurs at room tempera-ture. Equal parts of heated serum and cellular suspension Avere measured bya capillary pipette and mixed on a slide. From this mixture an ordinaryhanging drop was prepared and kept at room temperature. When patientscells were tested against normal heated serum the isoagglutination which oc-curred did not interfere in any way with the microscopic examination forrouleaux. Observations were made at the end of five minutes, thirty minutes,and one hour. Eouleaux formation often took place in 5 minutes and, as arule, it did not increase after 30 minutes. An arbitrary method to describethe degree of rouleaux formation in the preparation has been used, namely,none, slight, partial, and co
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