The easiest method is to suspend a double basket like the "jolly" has under a Mettler suspended pan hook ( take off the hanger and pan) and arrange so the lower basket is in a container of water ( I use a cover from a 50 CD spindle) and the upper basket is above the water. You then zero ( or take an initial weight) the suspension.
Then put the specimen in the upper basket, weight. Then put into the 2nd basket under water and weigh. then do the math.
These are surprisingly accurate also if one doesn't want to modify equipment.
http://www.mineralab.com/Specific%20Gravity.htm
Jim
