These categorical tables are therefore of universal application, and as they contain nearly one thousand qualifying forms, phases, etc., it will be seen that their use will greatly simplify the practical work of classification.

As will be seen by the above examples, the symbols of the Notation are perfectly simple combinations of letters and numbers. By treating the numbers decimally, it is possible to intercalate as many new ones as desired between any of the existing numbers, thus providing an infinity of places.

The Index is very extensive in the number of subject-words it contains, and comprises practically every topic likely to be encountered in ordinary practice. The Classification Tables themselves provide places somewhere for every remote subject, and the Introduction describes how such out-of-the-way matters are to be treated.

It is impossible to set forth all the features of this system of classification—its elaborate series of biographical numbers for arranging Fiction, Poetry and other alphabetical classes; its new system of short date-marks; its rules for the arrangement of special subjects, authors, etc.; and its notes on the simplification of the whole subject of book classification. Reference can only be made to the Summary Table of Main Classes for an idea of the size and style of the book.

Summary Table of Main Classes, with Abridged Notation

Main Classes
A—Generalia
B-D—Physical Science
E-F—Biological Science
G-H—Ethnology, Medicine
I—Economic Biology, Domestic Arts
J-K—Philosophy and Religion
L—Social and Political Science
M—Language and Literature
N—Literary Forms, Fiction, Poetry
O-W—History and Geography
X—Biography
AGeneralia
A0Generalia
A1Education
A3Logic
A4Mathematics
A5Geometry
A6Graphic and Plastic Arts
A9General Science
B, C, DPhysical Science
B0Physics, Dynamics
B1Mechanical engineering
B2Civil engineering
B3Architecture
B5Railways, Vehicles
B6Transport, Shipbuilding
B8Naval and Military science
C0Electricity
C1Optics
C2Heat
C3Acoustics
C4Music
C8Astronomy
D0Physiography
D1Hydrography, Hydrostatics
D2Meteorology, Pneumatics
D3Geology, Petrology
D4Crystallography, Mineralogy
D6Metallurgy, Mining, Metal trades
D7Chemistry
D9Chemical technology
E, FBiological Science
E0Biology
E1Botany
E2Cryptogams
E3Phanerogams
F0Zoology
F1Metazoa
F2Mollusca
F3Insecta
F4Pisces (Fishes)
F5Reptilia
F6Aves (Birds)[223]
F7Mammalia
G, HEthnology and Medicine
G0Ethnology
G2Human Anatomy and Physiology
G3Pathology
G4Materia medica
G5Therapeutics
G6Functions, Organs, Osteology
G7Nervous system
G8Sensory system
G9Respiratory system
H0Blood and Circulation
H1Digestive system
H2Urinary system
H3Reproductive system
H4Skin and Hair
H5Parasitical and Infectious diseases
H6Ambulance, Hospitals, Hygiene
H7Physical Training and Exercises
H8Field sports
H9Recreative arts
IEconomic Biology, Domestic Arts
I0Agriculture, Dairy farming
I1Veterinary medicine
I2Milling, Gardening, Forestry
I3Wood-working
I4Textile manufactures
I5Clothing trades
I6Costume. Jewellery
I7Vegetable and Animal products
I8Foods and Beverages
I9Gastronomy. Domestic economy
J, KPhilosophy and Religion
J0Metaphysics
J1Æsthetics, Psychology
J2Ethics
J3Philosophy
J4Theology, Religion, general
J5Mythology, Folk-lore
J6Church doctrines
J7Fasts and Festivals
J8Church Government
K0Non-Christian churches
K1Bible
K3Christology
K4Early and Eastern Christian churches
K5Monachism
K6Roman Catholicism
K7Protestantism. Episcopacy
K8Nonconformist churches
K9Presbyterian and other churches
LSocial and Political Science
L0Social science
L1Political economy
L2Government
L3Central and Local administration
L4Law
L5Trials. Actions
L6Criminology. Penology
L7Contracts. Property
L8Commerce and Trade
L9Finance
MLanguage and Literature
M0Language, general
M1Literature, general
M2African Languages and Literature
M2-3Asiatic Languages and Literature
M3Malayan-Polynesian Literature
M4European (Latin, etc.) Literature
M5European (Teutonic)
M6American
M7Palæography. Bibliography
M8Printing, Bookbinding
M9Library economy
NLiterary Forms
N0Fiction
N1Poetry
N2Drama
N3Essays and Miscellanea
O-WHistory and Geography
O0Universal history
O1Archæology
O2Universal geography
O3Africa, North
O4Egypt
O5East Africa
O6Central Africa
O7South Africa
O8West Africa
O9African Islands
POceania and Asia
P0Australia
P1Polynesia, Micronesia, etc.
P2Malaysia
P29Asia
P3Japan
P4China
P5Farther India. Malay States
P6India
P88Afghanistan
P9Persia
Q, REurope (South, Latin, etc.)
Q0Europe, general
Q1Turkey in Europe
Q12Turkey in Asia
Q2Palestine, Arabia
Q3Greece
Q4Balkan States
Q5Italy
R0France
R6Spain
R8Portugal
S, TEurope (North, Teutonic, Slavonic)
S0Russia in Europe
S15Poland
S2Finland
S25Russia in Asia
S3Austria
S34Bohemia
S4Hungary
S5Switzerland
S6Germany
T0Netherlands
T1Holland
T2Belgium
T5Denmark
T6Norway
T8Sweden
U, VBritish Islands
U0Ireland
U2Wales
U3England
V0Scotland
V5United Kingdom
V6British Empire
WAmerica
W0America, general
W02Canada
W1United States
W5Mexico
W6Central America
W63West Indies
W7South America
W72Brazil
W76Peru
W78Paraguay
W8Argentina
W83Chili
W9Polar Regions
XBiography
X0Collective and Class
X08Heraldry
X2Portraits
X3Individual Biography

240. Adjustable Classification.

240. Adjustable Classification.—The Subject Classification is the second scheme invented by Brown which has achieved success. The earlier scheme was the Adjustable Classification for Libraries, with Index, London, 1898, and is interesting as the forerunner of the much larger subject scheme. Only the main classes are given here: