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Melvil Decimal System: 541.2242

Wording: Mathematics and Science > Chemistry > Physical; Theoretical > Atomic theory > Not set > Not set > Not set

Dewmoji: 🔬 > > 💭 > ? > ? > ? > ?

0
Information
184,385
ℹ️
1
Philosophy and Psychology
173,011
💭
2
Religion
444,891
🙏🏽
3
Social Sciences
956,176
👫
4
Language
124,030
💬
5
Mathematics and Science
297,976
🔬
6
Technology
694,518
💡
7
Arts and Recreation
670,607
🎨
8
Literature
893,417
📚
9
Biography and History
568,807
🗿
50
General Science
23,895
🔬
51
Mathematics
56,778
52
Astronomy
16,339
🌌
53
Physics
30,187
🍎
54
Chemistry
19,100
55
Earth sciences & geology
26,354
🌎
56
Fossils & prehistoric life
6,177
💀
57
Life Sciences
40,976
🐠
58
Botany
16,527
🌿
59
Zoology
61,643
🐼
540
Chemistry
4,515
541
Physical; Theoretical
4,168
💭
542
Chemical laboratories
305
🔬
543
Analytic
1,843
🌈
544
Qualitative Analysis [No longer used]
180
545
Quantitative Analysis [No longer used]
135
546
Inorganic
1,705
547
Organic
4,685
548
Crystallography
636
💎
549
Mineralogy
928
541.0
148
541.1
2
541.2
Atomic theory
1,031
541.3
Physical chemistry
2,424
541.4
Various types of compounds
1
541.5
Molecular types
8
541.6
Compound radicals
541.7
Allotropy
35
541.8
3
541.9
Other general subjects
16
541.20
1
541.21541.22
497
541.23541.24
17
541.25
5
541.26
3
541.27541.28
224
541.29
541.220
37
541.221541.222541.223
37
541.224
183
541.225
40
541.226
34
541.227541.228541.229
541.2240
1
541.2241541.2242
47
541.2243541.2244541.2245541.2246541.2247541.2248541.2249

Works under MDS 541.2242

1–37 of 37 titles | covers | shelf

Wording

1922 Edition
Modern language
Emoji

"Far Friends"

MDS classes with significant recommendations overlap, excluding ones under the same top-level class.

None

What is MDS?

Melvil stands for "Melvil Decimal System," named after Melvil Dewey, the famous librarian. Melvil Dewey invented his Dewey Decimal System in 1876, and early versions of his system are in the public domain.

More recent editions of his system are in copyright, and the name "Dewey," "Dewey Decimal," "Dewey Decimal Classification" and "DDC" are registered trademarked by OCLC, who publish periodic revisions.

LibraryThing's MDS system is based on the classification work of libraries around the world, whose assignments are not copyrightable. MDS "scheduldes" (the words that describe the numbers) are user-added, and based on public domain editions of the system.

The Melvil Decimal System is NOT the Dewey Decimal System of today. Wordings, which are entered by members, can only come from public domain sources. The base system is the Free Decimal System, a public domain classification created by John Mark Ockerbloom. Where useful or necessary, wording comes from the 1922 edition of the Dewey Decimal System. Language and concepts may be changed to fit modern tastes, or to better describe books cataloged. Wordings may not come from in-copyright sources.

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