NSF certifies drinking water filters to standards applicable to each type of treatment option. You may notice the NSF mark on a product along with numbers such as NSF/ANSI 53 or NSF/ANSI 42, which refer to the standard to which the filter has been certified.
The definition of a canon is a principle, law or standard by which people are judged or a member of the clergy living according to these principles or laws. An example of a canon is a moral principle that a group believes is correct or proper.
Pachelbel's Canon is the name commonly given to a canon by the German Baroque composer Johann Pachelbel in his Canon and Gigue for 3 violins and basso continuo (German: Kanon und Gigue fÃ¼r 3 Violinen mit GeneralbaÃ) (PWC 37, T. 337, PC 358), sometimes referred to as Canon and Gigue in D or simply Canon in D. Neither the date nor the circumstances of ...