DECIMAL CLASSIFICATION 
553.6 
01 
62 
.63 
64 
635 
66 
67 
.68 
60 
m 
[1 
72 
73 
74 
75 
8 
0 
554 
355 
556 
557 
558 
550 
£60 
561 
562 
503 
504 
565 
566 
567 
568 
569 
Earthy economic minerals 
Fire clays Brick clays Potter’s clays 
Sands 
Rock salt Gypsum 
Phosphates Apatite 
Emery Corundum 
Hevy spar Sulfur 
Asbestos, etc. 
Limes and mineral cements 
Other earthy economic minerals 
Mineral waters 
Divide general works with o geograficly like 930-999; e.g. 
Mineral waters of Germany, 553.7043 
Alkalin 
Salin 
Chalybeate, ironbearing 
Sulfuric 
Calcic 
See also 551.23 
Gems Ornamental stones 
Other economic minerals 
Guano See also 631,85 
Geology of 
Geology of 
Geology of 
Geology of 
Geology of 
Geology of 
Europe 554-5530 subdivided by countries like 940-999 
Asia 
Africa 
North America 
South America 
Oceania Polar regions 
Paleontology eo Beano of Bagot so0.00s 
See also last paragraf of notes under 581.01 
Plants ser is subdivided like Botany, 580 
Invertebrates sez-seo is subdivided like Zoology, 592-599 
Protozoa Radiates 
Mollusks | 
Articulates 
Vertebrates 
Fishes Batrachia 
Reptils Birds 
Mammals