By 1866, the firm was valued at more than $1 million. In 1869, the transcontinental railroad was completed; Gilman changed the firm's name to Great Atlantic & Pacific Tea Company to promote the then-new concept of prepackaged tea under the Thea-Nector brand.The tea company continued to use the Great American name for mail-order purposes.n 1869, the transcontinental railroad was completed; Gilman changed the firm's name to Great Atlantic & Pacific Tea Company to promote the then-new concept of prepackaged tea under the Thea-Nector brand.
An electric current carries electrons from an area of high  potential to another area of low potential. Potential difference is  the condition that must exist for a current â¦ to move electrons  around.
The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.Electric currents cause Joule heating, which creates light in incandescent light bulbs.an-made occurrences of electric current include the flow of conduction electrons in metal wires such as the overhead power lines that deliver electrical energy across long distances and the smaller wires within electrical and electronic equipment.