24 



ETHEL M. ELDERTON 



Fig. (i). 



Self-measurement of the left hand by means of the hand-spanner. 



(i) Width of Wrist. See Figure (i). 



Feel for and satisfy yourself as to the positions of the bony protuberances on 

 either side of the main joint of the wrist. They 

 are the sides of the ends of the two bones of 

 the forearm. The space between the outer sides 

 of these has to be measured with tbe spanner. 

 Hold the spanner in the right hand, resting its 

 fixed jaw against tbe breast, and manipulate 

 the movable jaw with the spare fingers of the 

 right hand. Lay the left wrist back upwards 

 between the jaws of the spanner, so that the 

 bony protuberances come against the jaws. 

 Close the jaws with gentle pressure and clamp 

 the movable jaw with the clamping nut under- 

 neath. Repeat this at least once, and if time 

 will allow twice, taking the reading each time 

 and entering it on the schedule. Do not be 

 surprised if your measurements are not exactly 

 the same. Only suspect something is wrong, 

 difference in your results. If this be so, test carefully again. Do not fill in column 

 marked "mean," but leave this to those who have to reduce the observations. 



(ii) Width of Hand. (Left hand, as before.) See Figure (ii). 



Feel for and satisfy yourself as to the positions of the outer sides of the knuckles, 

 the one side being formed at the joint at 

 the base of the little finger, the other at 

 that of the forefinger. The hand is to be 

 placed with the fingers close together, with 

 the palm upwards, and all the knuckles 

 t muLiug the spanner. Measure the width 

 between the outer sides with the spanner 

 held with the fixed jaw against the breast 

 and the scale horizontally upwards. Bring 

 the movable jaw without pressure against 

 the knuckle at the base of the forefinger. 

 Clamp and read the scale. N.B. — Take 

 care to make two or three trials. 



you 



find 



two units 



