g on in any function of the body except the
teeth. "There are happily no grounds for associating dental degeneracy
with progressive physical deterioration." The increase in optical
defects is attributed not to the deterioration of the eye, but to
greater knowledge, more treatment, and better understanding of the
connection between optical defects and headache.

[Illustration: Testing Environment--House Score]

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| DEFINITIONS OF TERMS USED IN HOUSE SCORE CARD |
| |
| LIGHT--Light enough to read easily in every part. |
| |
| GLOOMY--Not light enough to read easily in every part, but enough |
| readily to see one's way about when doors are closed. |
| |
| DARK--Too dark to see one's way about easily when doors are |
| closed. |
| |
| WELL VENTILATED--With window on street or fair-sized yard (not |
| less than 12 ft. deep for a five-story tenement house not on a |
| corner), or on a "large," "well-ventilated" court open to the sky |
| at the top: "large" being for a court entirely open on one side to |
| the street or yard in a five-story tenement, not less than 6 ft. |
| wide from the wall of the building to the lot line; for a court |
| inclosed on three sides and the other on the lot line in a |
| five-story tenement, not less than 12x24 ft., "well ventilated" |
| meaning either entirely open on one side to the street or yard, or |
| else having a tunnel at the bottom connecting with the street or |
| yard. |
| |
| FAIRLY VENTILATED--With window opening on a shallow yard or on a |
| narrow court, open to the sky at the top, or else with 5x3 inside |
| window (15 ft. square) opening on a well-ventilated room in same |
| apartment. |
| |
| BADLY VENTILATED--With no