Reginald J. Gladstone 
107 
London, and the vertical diameter by an instrument, Fig. 1, similar to the one 
which I have previously described and figured in the Report of tite Proceedings of 
the Anatomical Society, November, 1901 ; the instrument which we have used for 
the post-mortem measurements has, however, been improved by the adoption of a 
suggestion made by Mr J. Gray, namely, the substitution of a vertical screw to act 
upon the indicator, for the rack and pinion with which the first instrument was 
fitted. Any slipjjing of the measuring rod, from the instrument working loose, is 
thus avoided. 
Fig. 1. Instrument lor measuring the vertical height of the head, from the biauricular line 
to the vertex. 
The circumference and the longitudinal and transverse arcs have been taken 
with a Chesterman's steel tape-measure. 
Although the longitudinal and transverse arcs were measured, and are pre- 
served in each case, we have not made use of them in constructing any of the 
tables or formula^ The diameters being in our opinion the more trustworthy 
measurements, since they are less influenced by variations in the amount and 
thickness of the hair, and because the points between which the measurements are 
li— 2 
