For example, for the Gases under pressure hazard class, the hazard categories are Compressed gas, Liquefied gas, Refrigerated liquefied gas and Dissolved gas. These classes relate to the physical state of the gas when packaged and do not describe the degree of hazard.
1 In 1596, a flush toilet was invented and built for Queen Elizabeth I by her Godson, Sir John Harrington. 2  The first patent for the flushing toilet was issued to Alexander Cummings in 1775. 3  During the 1800s, people realized that poor sanitary conditions caused diseases.
Rags were the principal raw material and they were in short supply, thus limiting growth. 1391: The first toilet paper reported was used by the Chinese emperor. As a luxury item, only royalty had access to toilet paper. The paper was made in 2 ft x 3-ft sheets.The Bureau of Imperial Supplies began producing 720,000 sheets of toilet tissue per year.857: New Yorker Joseph Gayetty introduced the first packaged Toilet Tissue in the United States. The Gayette Firm, located in New Jersey, produced and sold a package of 500 sheets selling for $0.50 It was named âTherapeutic Paperâ and served as a medical paper. It contained an abundance of aloe to help cure sores.