. Medical diagnosis for the student and practitioner. tube shoidd be usedfor observation, a simple roll of black paper being ordinarily sufficient. Hemoglobin Estimation by Specific Gravity.—By the use of tables to be * This instrument is now made with a battery handle and pushbutton circuitbreaker which adds greatly to its usefulness. Fig. 31.—Dares hemoglobinometer-U. Observation tube. T. Shield. W-Removable plate with capillary opening forholding blood. X. Thumb-screw holdingsame. Y. Candle holder and candle. holding color disc R. Milled wheelor revolving color disc. Simple andreliab
. Medical diagnosis for the student and practitioner. tube shoidd be usedfor observation, a simple roll of black paper being ordinarily sufficient. Hemoglobin Estimation by Specific Gravity.—By the use of tables to be * This instrument is now made with a battery handle and pushbutton circuitbreaker which adds greatly to its usefulness. Fig. 31.—Dares hemoglobinometer-U. Observation tube. T. Shield. W-Removable plate with capillary opening forholding blood. X. Thumb-screw holdingsame. Y. Candle holder and candle. holding color disc R. Milled wheelor revolving color disc. Simple andreliable. n8 MEDICAL DIAGNOSIS found in all the larger works dealing with this subject the hemoglobin presentin a given specimen may be very accurately estimated by Hammerschlagsmodification of Roys method. The procedure is too cumbersome and fussyto be recommended to the practitioner and will not be described. Olivers Hemoglobinometer.—As shown by Fig. 33, this instrument de-pends upon the scale of colors based upon diluted blood. Its use is suffi-. Axt excellentinstrument. Courtesy of A. H. Thomas 6* Co. Fig. 32.—Von FleischPsHemoglobinometer (MieschersModification).—Description.—Milled wheel at left (T) moves a tinted glass wedge (R) under the fixed metal stage sur-mounted by double chamber reservoir which receives light from the calcium sulphatereflecting disc (P S) below. Half of the same chamber is filled with the diluted blood con-tained in the measuring capillary pipette (Mel). The other contains only plain water butreceives its light from the colored wedge. By moving the wedge back and forth the colorsare matched and the percentage reading is shown on a scale visible through the opening (M)just in front of the supporting-upright. The blood is obtained in exactly the same manneras for a blood-count, the diluent being calcium carbonate solution ( per cent.) and thetube permitting the observer to use dilutions of 11200, 11300 or 11400 according to theheight to wh
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
