. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . FiQ. 17. Tracings fkom the fokeakm bt Eelangebs sphtgmomanometee dtjriitg THE release of PEESSHKE IN ANOTHER INSTRUMENT ON THE UPPER ARM. A. Slow release. Eudimentary waves at 102 mm., well-developed at 98 mm. The pulse, at 102 mm., was palpable, with care. B. Fast release. Eudimentary waves at 100 mm., well-developed at about 90 mm. A few abnormally lar
. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . FiQ. 17. Tracings fkom the fokeakm bt Eelangebs sphtgmomanometee dtjriitg THE release of PEESSHKE IN ANOTHER INSTRUMENT ON THE UPPER ARM. A. Slow release. Eudimentary waves at 102 mm., well-developed at 98 mm. The pulse, at 102 mm., was palpable, with care. B. Fast release. Eudimentary waves at 100 mm., well-developed at about 90 mm. A few abnormally large pulses came through above 100 mm. The pulse couldscarcely have been felt above 95 mm. have found this an awkward procedure, and even more unsatis-factory in stout arms than palpation at the wrist. Evidently,therefore, in some cases the well-developed waves are the firstfelt, and with the novice this is the rule. The underestima-tion I do not believe can exceed 5 mm., where due care is used,except with irregular or very rapid pulses, since the points ofdisappearance and return may usually be determined within 5mm. of one another. Cook and Briggs,* who take the mean ^ Cook, H. W., and Briggs, J. B. Clinical Observations on Blood-press
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