United States USA Date:1932 Duration:7 min 16 sec Sound:NO SOUND
A study of rats. Examples of rat proofing, a man measures the dimensions of a house. A diagram shows the right and wrong way of construction of an elevated building for rat proofing. A diagram of chain and curtain walling. Marks on a wall as a man measures it. Correct construction of food establishments. The construction of correct wooden floor. Wooden planks on the floor, a man hammers nails in the wooden planks on the floor. An elevated house prepared for rat proofing. Men remove wire gauze from the lower portions from all three sides. A diagram of the ventilations and doorways in the structure. A diagram shows the correct and incorrect way of construction, concrete garage, and walks. A man takes measurements of a concrete pathway.
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