chemical indicator

Table of Contents

Introduction References & Edit History Related Topics

Images

alkaline testing

Discover

Young boys working in a thread spinning mill in Macon, Georgia, 1909. Boys are so small they have to climb onto the spinning frame to reach and fix broken threads and put back empty bobbins. Child labor. Industrial revolution

The Rise of the Machines: Pros and Cons of the Industrial Revolution

A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

Artwork for themes for Pro-Con articles.

Pro and Con: Gun Control

Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that

America’s 5 Most Notorious Cold Cases (Including One You May Have Thought Was Already Solved)

Baseball laying in the grass. Homepage blog 2010, arts and entertainment, history and society, sports and games athletics

10 Greatest Baseball Players of All Time

Secret Service Agent Listens To Earpiece

Secret Service Code Names of 11 U.S. Presidents

Santa Claus flying in his sleigh, christmas, reindeer

Was Santa Claus a Real Person?

chemical indicator: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Photos

alkaline testing

See All Images →

Topics

phenolphthalein litmus diphenylcarbazone ferrous 1,10-phenanthroline methyl yellow volumetric analysis titration