366 REPORTS ON THE STATE OF SCIENCE. 
should occupy in turn the same chair, with movable blocks of known 
thicknesses on the seat to raise the heads of successive sitters to a uniform 
height. It is, however, tedious and clumsy to adjust each sitter’s height 
by trial in front of the camera. The simpler plan is to make the sitter 
first take his place on a separate seat with his back to a wall, on which 
are previously marked, at heights corresponding to those of the various 
heights of head, the numbers of the blocks that should be used in each 
case. The appropriate number for the sitter is found and noted, and 
then the proper blocks are placed on the chair by the observer or an 
assistant, with the assurance that what is wanted has been correctly 
done. 
4, The position of the sitter is easily controlled by the operator if he 
looks at the sitter’s head over the middle line of the camera, against a 
mark on the background. 
The subject can also be caused to adjust himself approximately by 
means of sights arranged on the side of the camera, as follows :— : 
A is a small mirror with a cross + painted onit. It is set at an 
angle of 45° to the sitter’s line of sight. 
DIAGRAM A. DIAGRAM B. 
Cc 
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B is a pin with head of glass or polished metal. The sitter is told to 
keep the head of the pin sighted in the intersection of the cross. 
The same device may be employed in photographing side-face to keep 
the sitter in the right focal plane. In this case the sights are set up in 
the focal plane, facing the sitter. Or a small plain mirror (C) may be 
hung up, so that the sitter can only see his face in it when he is in the 
right pose and focal plane. 
Report of the Educational Sub-Committee. 
In dealing with anthropometrics in schools the chief factors which 
the Sub-Committee has had to take into consideration are time, expense, 
and the object of the investigations. If time and expense did not enter 
into the question, it is hardly necessary to remark that, from the scientific 
point of view at least, the measurement of school-children would require 
no special scheme of observations as apart from a general survey of 
the population. In present circumstances, however, when a crowded 
