You boil it in sawdust: you salt it in glue: You condense it with locusts and tape: Still keeping one principal object in view — To preserve its symmetrical shape. (scientificamerican.com)
Are they not all occupied as showmen whose principal object is to attract pupils and make money?» (newscientist.com)
This secondary outflow is seen almost at right angles to the principal object and is apparently carving its own hole out of the surrounding cloud. (alma-telescope.jp)