A. A Minister Plenipotentiary is an Ambassador or Envoy, invested with full powers to negotiate a treaty, or do some other special business, without being a permanent resident of such country. Under such circumstances, he is called Ambassador extraordinary. Q. What is a Consul? A. A person commissioned to reside in a foreign country as an agent or representative of a government, to protect the rights, commerce, merchants and seamen of the country, and to aid in commercial, and sometimes in diplomatic transactions, with such foreign country; he is sometimes called Ambassador or Minister ORDINARY. SALARIES. Q. What are the salaries of the Cabinet officers? A. Each member receives eight thousand dollars a year. Q. What are the salaries of Senators, and Representatives in Congress? A. Each receives an annual salary of five thousand dollars a year, and an allowance of twenty cents per mile for travel in going to and returning from Washington. Q. Name a few of the highest salaries paid Ambassadors, Ministers and Consuls. To London, To Paris, To Berlin, To St. Petersburgh, $17,500 each. To Vienna, To Madrid, To Pekin, To Rome, To Yeddo, To Mexico, To Rio Janerio, $12,000 each.