Rule of thirds as a rule for the proportion of warm to cold colors in a painting, and attributes to Smith the expansion of that rule to all proportions in painting: Sir Joshua has given it as a rule, that the proportion of warm to cold colour in a picture should be as two to one, although he has frequently deviated therefrom; and Smith, in his "Remarks on Rural Scenery," would extend a like rule to all the proportions of painting, begging for it the term of the "rule of thirds," according to which, a landscape, having one third of land, should have
Rule of thirds (military) the few nations that can afford both the manpower costs of doing this, while still being able to ensure that enough boats are in service to have the ability regularly to stagger boats out for deep maintenance without appreciably affecting the total number available. Rule of thirds (military) The rule of thirds is a rule of thumb used when planning for the deployment and usage of a military organisation, according to which one third of the total military forces involved should be available for operations, one third should be preparing for operations and the final third, having been on operations,