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CONTENTS 



PROBLEM 



221 



• • 



To determine what parts of the body are most sensitive to (a) touch, 

 (6) heat and cold ...... 



222. To study the anatomy of the nervous system 



223. To study the structure and use of neurons . 



224. What is a reflex action ? 



225. To compare the reaction time of hearing and toucli 

 22G. To compare a reflex action with an act of thought 



227. To study habit forming 



228. To study the mechanism of habit formation 



229. To consider some harmful habits 



230. How to go to work to form good habits 



231. To determine the relation between taste and smell with reference to 



food flavors ........... 



232. How to find out certain defects of vision in the laboratory 



233. What are some of the effects of alcohol on the nervous system ? 



XXIV. Man's Improvement of his Environment . 



234. How to ventilate my bedroom (Home problem) 



235. To compare the duster and the dry cloth with the moist cloth in 



cleaning the schoolroom ........ 



236. What should I eat for luncheon ? 



237. To make a sanitary map of my own environment .... 



238. To determine the bacterial content of different grades of milk . 



239. To determine the bacterial content of some kinds of water 



240. To determine some of the problems of water supply and sewage dis- 



posal for a city 



241. Is typhoid a city or a country disease ? 



242. What is the annual cost to New York city of some preventable 



diseases ?.......••.• 



243. What are the chief causes of death in a city ?...-. 



244. To study the relation of the death rate to the season .... 



245. To find a relation between flies and mortality 



246. To determine the number of school children who needed treatment 



for different diseases in New York city, 1914-1915 



247. How to discover the presence of adenoids 



248. To find some ways of preventing the spread of disease 



249. First aid in the home. A summary of what to do and how to do it . 



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