Some Basics About Flu and Colds. Each year, Americans get more than 1 billion colds, and between 5 and 20 percent. of Americans get the flu. The two diseases have some symptoms in common, and. both are caused by viruses. However, they are different conditions, and the flu is. more severe. Unlike the flu, colds generally don ât cause serious complications, such. as pneumonia, or lead to hospitalization.
Bonderized steel is actually Galvanized steel that has been put through a phosphate bath and has a layer of Chromate applied and dried. The process produces a dull gray colored finish which provides for a good primer in order to be painted.
A wide variety of names are commonly used for petrified wood. Fossilized wood is a general term for wood that has been petrified or preserved by other methods of fossilization. Opalized wood is petrified wood that has been replaced by opal, an amorphous form of silica.Agatized wood is wood that has been replaced by agate, a form of chalcedony or microcrystalline quartz.mall pieces of petrified wood can be placed in a rock tumbler to make tumbled stones. Only a small fraction of petrified wood is suitable for lapidary work. Poorly preserved specimens, those with lots of voids or closely-spaced fractures do not polish well or break while being worked.