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the idea of constructing a double armlet, the proximal band of which 
was to receive those so-called ‘‘Rand-Pulsationen” whilst a separate 
distal-band, was connected in a peculiar way with a writing-apparatus 
(ERLANGER) and noted the fluctuations of volume of the artery. 
Wrsauw however placed the two bands close to each other. And 
now it appeared to us that even with a pressure in the two bands 
greater than the J/ 5p the “Rand-Pulsationen” were still transmitted 
by the upper band to the lower one (compare the curves). 
With the present pretty well general use of the broad armlet 
‘only Sani still uses the narrow one) another difficulty presents itself. 
Let us first consider the Mp. 
If in the broad armlet a pressure is made, that is a little less 
than the Mp, then the armlet will already be able to close the 
artery, for just because the armlet is so broad, part of the pressure 
of the artery will be spent under the armlet. Consequently the pres- 
sure in the artery at the lower edge of the armlet will become less 
than that at the upper edge, whilst the latter is equal to the M Bp. 
The pulsations transmitted to the armlet will thus become smaller, 
before the Mp is reached in it. With Sanit we are of opinion 
that this is an objection to the broad armlet. It will be the question 
if the advantage with regard to the surrounding tissues, that the 
broad armlet undubitably affords (v. RRCKLINHHAUSEN), Compensates 
this disadvantage. At all events it would be desirable, that it was 
generally agreed always to use an armlet of a definite breadth in 
order to obtain figures that can be compared. 
It will at all events have become evideni that for the determination 
of both the MBp and the mbp, according to this method, much is 
left to the subjectivity of the investigator. It appeared to us during 
the observations, made with Wysavw’s apparatus, that, on account 
of the imperceptible increase or decrease of the pulsations, it is 
extremely difficult exactly to read the two moments. | 
B. Palpatory Method. 
If one causes the pressure gradually to increase, two moments 
can be observed at the palpation of the distal pulse. In the first place 
a moment at which that pulse becomes less intense and secondly a 
moment at which it disappears. At the first moment the mbp, at 
the second the MBp would be reached in the armlet. 
For if the pressure of the armlet >> the diastolic pressure in the 
artery, the artery will be closed for a moment during the diastole 
of the heart. Then a certain. force will be required to press the artery 
