Center for Appropriate Transport Center for Appropriate Transport The Center for Appropriate Transport (CAT) is a non-profit community center dedicated to bicycles and alternative transport located in Eugene, Oregon, United States. CAT holds publicly funded educational workshops for teaching youth from ages 12 to 21. Within the facility there is a public bicycle repair workspace and a bike machine-shop for the design and manufacture of special-purpose bikes, particularly cargo bikes and recumbents. There is also a bike museum on site, a bike rack-building workshop, and a sewing facility. CAT formerly held the offices of "Oregon Cycling" magazine, which ceased publishing in 2009. CAT is
History of the battery 1860s, a Frenchman named Callaud invented a variant of the Daniell cell called the gravity cell. This simpler version dispensed with the porous barrier. This reduced the internal resistance of the system and, thus, the battery yielded a stronger current. It quickly became the battery of choice for the American and British telegraph networks, and was used until the 1950s. The gravity cell consisted of a glass jar, in which a copper cathode sat on the bottom and a zinc anode was suspended beneath the rim. Copper sulfate crystals would be scattered around the cathode and then the jar would