| Show importance of proper diet fhe basis of all foods consola of at least four essential elements but it does not follow tha all these elements will be present in equal proportions in various life sustaining substances thus weight for weight bread contains more carbon than meat and meat more nitrogen than bread these theoretical cons alons are borne out by observed facts modern researches have shown tha there Is an intimate relation subsisting between the quality and quan city of food taken and the kind ot work or energy nto which tt 1 eventually transformed hence a man s diet ought to depend in great part on his work |