*889.] ArchcBology atid Anthropology. 517 
now we test his sensation as to size, form, etc., which is not 
affected by disease, but it is a question purely of truthfulness 
of sensation or impression. Show him a yard stick, and let 
him mark the middle of it — divide it into feet or inches. Let 
him do it slowly but correctly. Compare two lengths — draw 
parallel lines, some true and some untrue — try him with angles, 
right, and other than right. Invent methods to test the cor- 
rectness of his impression on his mind as derived from the 
operation on the sense of sight. 
As a second lesson or course give him the chalk and let him 
make on the board the lines which he has just tried. Let him 
make a straight line of certain length ; an inch, a foot, a yard 
— a right angle, a square, a circle, parallel hues, etc., etc. 
Having exhausted correctness, test him for rapidity — have 
him do the same things and in addition to correctness, require 
rapidity. 
To correctness and rapidity in such elementary matters let 
us add the test of power of observation, that is, the capacity to 
see things, to see them correctly, rapidly, and to note their num- 
ber, position, quality, etc. This is only to note the sensation 
obtained from a larger view than the sticks and lines first 
shown. It is still the mental impression derived from the 
operation of the sense of sight. 
March the candidates or class into a room, stay five min- 
utes, and out again — then describe every article seen ; try one 
minute; try unfamiliar rooms; try a picture; conduct them 
past an open door at a slow pace, and then ask them to tell 
every article seen in the room. 
All these tests can be registered for each candidate, and the 
result will be his mental capacity in each of these regards, cor- 
rectly expressed in figures. 
Then try him with the sense of hearing, of touch, possibly 
of smell. You will say this will sharpen his senses. I prefer 
to say it will sharpen his w//^— that it educates him, it causes 
him to correctly note the impression of the object as pre- 
sented to the senses and as correctly to report or carry it to 
his mind. All this is but that mental quality called attention. 
After attention, memory. Thus we may measure by Anthro- 
pometry the mental qualities of sensation, impression, atten- 
tion, and memory. 
These are the faculties by which the mind of man receives 
its communications from the world. By their means it obtams 
the raw material to be worked up in the laboratory of thought. 
