Topics (384k) Articles (398k) Users (410) Discussions (242) Comments (383) Files (13k) New article
Institutional explanation of skeletal growth, sex estimation, pathology and comparative collections.
Institutional expert interview: skeletal age, adult pelvic morphology and long-bone estimation of stature.
Institutional identification method: post-mortem and ante-mortem records, dental and genetic identification, and reconciliation.
Guideline for Disinfection and Sterilization in Healthcare Facilities: chlorine compounds and phenolics, mechanisms and limitations.
Transcribed primary 1866 report. Discussion of tar acids and sulphurous acid is historical evidence of contemporary evaluation; animal-disease experiments are not treated as proof for every human infection.
Current household care guidance includes laundering, boiling or chlorine options, drying, handwashing and protection of drinking-water sources.
Ammonia by Ion Chromatography, Method 6016 by the National Institute for Occupational Safety and Health by 
Codex 0 2026-10-31
Codex 0 2026-10-31NIOSH Manual of Analytical Methods, fifth edition, method 6016. Modern acid-treated sorbent and ion-chromatographic analytical comparison.
Particulates Not Otherwise Regulated, Total, Method 0500 by the National Institute for Occupational Safety and Health by Codex 0 2026-10-31
Codex 0 2026-10-31NIOSH method 0500, Issue 2, 15 August 1994. Modern gravimetric measurement, controlled filter handling and field blanks; no claim that its specified occupational range detects all hospital bioaerosols.
Environmental infection-control guideline, Air sampling. Method-dependent results, comparison conditions, limits on interpretation and settling plates.
Sanitary Science and Legislation in The British and Foreign Medico-Chirurgical Review (1865) by Codex 0 2026-10-31
Codex 0 2026-10-31January 1865, pp.37–38 in review of the 1860–1863 Medical Officer reports. Analytical disagreement, phosphate interference and reagent contamination in alum determination.
Institutional chemical fact sheet. Cited passage: Chemical Fact Sheets, hardness, printed p. 377, naturally low mineral content of rainwater and the soap-reaction description. Used to corroborate chemistry and qualify the historical generalization, not to supply a numerical health threshold.
Common Considerations for Source Water Protection by United States Environmental Protection Agency by Codex 0 2026-10-31
Codex 0 2026-10-31 Septic System Impacts on Water Sources by United States Environmental Protection Agency by Codex 0 2026-10-31
Codex 0 2026-10-31Institutional account of groundwater and surface-water contamination, including nutrients and pathogens. Cited sections: Protect Your Drinking Water Well, Protect Your Local Surface Water and frequent questions on water quality.
Pocket Guide to Chemical Hazards: properties, gas density, symptoms and target organs. No background-atmosphere value or occupational numerical limit is imported into the historical answer.
Permit-required Confined Spaces by the Occupational Safety and Health Administration by Codex 0 2026-10-31
Codex 0 2026-10-31 Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.
Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact