EXPERIMENTS AND PRACTICAL WORK 83 



a badly ventilated room in which a number of persons 

 sleep. Observe the precipitate on the surface of the 

 lime-water. 



THE CLOTHES WE WEAR 



(See Tropical Readers, Book II, pp. 174-178.) 



Expt. 204. Sources of Materials used for Clothing. 

 Make drawings of the plants or animals from which 

 the materials used for clothing may be obtained. 



Expt. 205. Collection of Materials used for Clothing. 

 Make a collection of the different classes of materials 

 used for clothing, and to each attach a label, with its 

 name and a note about its special uses. 



Expt. 206. Effect of Heat on Different Colours. 

 Expose bits of white and black cloth of the same size 

 and material in the sun on a hot day. Observe which 

 gets hotter first. 



Expt. 207. Flannel is very absorbent of Moisture. 

 Observe that a flannel shirt absorbs more perspiration 

 than a linen or cotton one. 



SOIL AND CLIMATE, OR WHERE TO LIVE 



I AND II 



(See Tropical Readers, Book II, pp. 178-183.) 



Expt. 208. Healthy and Unhealthy Sites for Houses. 



(a) Notice the nature of the country around the 

 school, and decide on a position that you think would 

 be a healthy site for a house. Record the reasons for 

 your selection. 



