KEY TO CLASSIFICATION. 1 



ACETYLENE, TP 765. 

 Adulteration. QD 71. 

 Aeronautics, TL 501. 

 Agricultural Chemistry, S 583. 

 Agriculture, S. 

 Air Compressors, TJ 990. 

 Anatomy, QL 801. 

 Anthropology, GN. 

 Artillery, Ur. 

 Astronomy, QB. 



BACTERIOLOGY, QR. 

 Bee-keeping, SF 521. 

 Biology, QH 301. 



Marine, QL 121. 

 Botany, QK. 

 Brewing, TP 570. 



CERAMICS, TP 785. 

 Chemical Analysis, QD 71. 

 Chemistry, QD. 



Applied, IP. 



Colloidal, QD 549. 



Inorganic, QD 151. 



Organic, QD 251. 



Physical, QD 450. 

 Children's Diseases, RJ. 

 Circulatory system. Appendix. 

 Coal-mining, TN 802. 



Cold Storage, TP 490. 

 Colloidal Chemistry, QD 549. 

 Concrete Construction, TA 680. 

 Cryptogams, QK 505. 

 Crystallography, QD 901. 

 Cytology, QH 581. 



DAIRY, SF 221. 



Dentistry, RK. 



Dermatology, RL. and Appendix. 



Disinfection, RA 761. 



Dust Prevention, RA 575. 



Dyeing, Bleaching, etc., TP 890. 



ELECTRICAL Engineering, TK. 

 Electro-chemistry, TP 250. 

 Electro-therapeutics, RM 869. 

 Engineering, TA. 



Military, UG. 

 Entomology, QL 461. 



FACTORY Organisation, TS 155. 

 Fermentation Industries, TP 500. 

 Fisheries, SH. 

 Flour-milling, TS 2120. 



Foods, TX 341. 

 Fungi, QK 601. 



GARDENING, SB 451. 

 Gas Manufacture, TP 700. 

 Geodesy, Surveying, QB 281. 

 Geology, QE. 



Economic, TN 260. 

 Glaciers, GB. 



Gums and Resins, TP 977. 

 Gynecology, RG. 



H.EMATOLOGY, RB 145. 



Heart, diseases. Appendix. 



Horology (for Clock and Watchmaking), 



TS 540. 



Hydraulic Engineering, TC. 

 Hygiene, Military, UH 600. 



Public, RA 421. 



ILLUMINATION and Illuminants, TP 700. 

 India-rubber, TS 1870. 

 Iron and Steel, TS 300. 



LARYNGOLOGY, RF. 

 Leather Trade, TS 940. 

 Lifting and Conveying, TJ 350. 



MACHINE Tools, TJ 1185. 

 Marine Biology, QL 121. 

 Mathematics, QA. 

 Mechanical Engineering, TJ. 

 Medical Electricity, RM 869. 

 Medicine, R. 



Clinical, RC 61. 



Tropical, RC 960. 

 Metallography, TN 690. 

 Metallurgy, TN 600. 

 Meteorology, QC 851. 

 Microscopy, QH 201. 

 Military Engineering, UG. 



Hygiene, UH 600. 



Medicine, RC 971. 

 Mineral Industries, TN. 



Oils, TN 870. 



Water Trade, TP 628. 

 Mineralogy, QE 351. 

 Mycology, QK 601. 



NATURAL History, QH. 

 Naval Science, V. 

 Nervous Diseases, RC 321. 



OBSTETRICS, RG. 



x The classification is that of the Library of Congress, Washington. 

 5 



