Measure the meniscus at eye level from the center of the meniscus. In the case of water and most liquids, the meniscus is concave. Mercury produces a convex meniscus.
2016-05-25T21:56:09-04:00. The main purpose of Gandhi's Quit India speech is to awaken and call for a united civil disobedience by the masses. This is in support for Gandhi's cause to break free from the British imperialism through a passive resistance of the people. This question is archived.
  The main purpose of the United Nations is to facilitate cooperation in international law, international security, economic de â¦ velopment, social progress, human rights and ultimately world peace.he main purpose of the United Nations is to function as a representative assembly so that each membership country of the UN can have a diplomatic voice via its delegates to t â¦ he UN.