An employee by the name of Willie Griggs decided to file a lawsuit on behalf of himself and twelve other employees against Duke Power Company. Griggs' claim was that the diploma requirements and the intelligence tests were used as an intent to discriminate against black employees and were against the Title VII of the Civil Rights Act of 1964.
Ammonia solutions are used to clean, bleach, and deodorize; to etch aluminum; to saponify (hydolyze) oils and fats; and in chemical manufacture. The ammonia sold for household use is a dilute water solution of ammonia in which ammonium hydroxide is the active cleansing agent.
--Ted. Baking ammonia, also known as ammonium bicarbonate, is a white powder or crystal that was used for leavening baed good prior to the creation of modern baking powder. I wrote an article about it a few years ago -- What is Baking Ammonia.