DECIMAL CLASSIFICATION 
632  Hindrances Protection 
Including blights, pests and insects injurious to either plants or animals, but materia 
relating to diseases of animals is better clast in 619 or 636.089 and may attract al 
matter specially relating to animals 
Elemental destruction Protection 
Low temperature, frost. freezing 
Methods of protection 
Warnings: wether bureau, thermometers 
Covering 
Artificial clouds 
Fires 
II 
III 
112 
113 
114 
115 
116 
117 
118 
Repairing damages 
Excessiv heat and drout 
12 
13 
14 
I 
16 
17 
.I8 
10 
Hail 
Lightning 
Wind and rain 
Floods, inundations 
Fires: forest and prairie 
Other destructiv agents 
Earthquakes, fumes, gas, etc, 
Galls Cecidiology 
No subdivision at present 
Bacteria and bacterial diseases 
No subdivision at present 
Fungi 
Divided like 580.2. See also 632.9 
Parasitic and injurious plants 
Weeds 
Plants injurious to animals 
Yy 
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