906 : l General Notes. ; - [October, 
been devised by Mr. H. Darwin, which avoids the disadvantage 
experienced in the old dynamometer when the handles are 
brought close together. 
In criticising the apparatus used for testing acuteness of sight, 
Dr. Brudenell Carter drew attention to the difference between 
. testing the acuteness of vision and the acuteness of perception of 
slight differences of the intensity of light. He contended that 
nothing was an accurate test of acuteness of vision unless it called 
upon the person tested to see the separateness of two or more 
objects, such as spots, which were separated from each other by 
intervals equal to their own diameters. : 
Mr. Galton draws attention to the apparatus devised by Mr. 
Cattell, an American, now assistant in Professor Wundt’s Labora- 
tory, at Leipzig, for testing the color and the sound sense.—7F. 
Anthrop, Inst., xvi, 2-11. 
Tae CepHALic InpEx.—The two essentials to a correct system 
of obtaining the rates of the length to the width of the skull are 
(1) that the measures should always be taken upon exactly the 
same points, and (2) that the fractional limits of the terms doli- 
chocephalic, mesaticephalic, and brachycephalic should be the 
same for all investigators. Now, great efforts have been made in 
France and Germany to achieve these results, and Dr. Garson, 1n 
England, following the instructions of the Anthropological In- 
stitute, has conducted an extensive correspondence to the same | 
end, and an international agreement has been reached, as fol- 4 
lows: : i 
1. The metric system is to be used exclusively in all linear 
measurements. : : 
= 2. The cephalic index to be calculated from the maximum 
length and maximum breadth of the cranium; the maximum 
% 
- point of the os occipitis behind, in the mesial plane. na 
mum breadth is the width across the broadest part of the a 
the glabella of the os frontis in front, and the most ge 7 
wherever that may be, except on the mastoid processes and the 
_supramastoid ridges, measured vertically to the mesian — ne . 
points of measurement lying opposite to one another in the sa 
horiz plane. ty 
“~ 
tral group Be: a 
phalic and brachycephalic respectively, a 
of 70 to 74.9, the latter of 80 to 84-9- — / 
Se li it 
i ssi 
