Aeronaut John Steiner inflates his hot air balloon at Erie, Pennsylvania, as seen in the oldest known photograph of an aircraft, a quarter-plate ambrotype taken in June 1857.
Take a look at your dinner plate proportions - you should fill one half with non-starchy vegetables, one quarter with lean meats or alternatives, and one quarter with starchy carbs.
看看你餐盘中的食物比例，应该是一半非淀粉蔬菜，四分之一瘦肉或者肉类替代品，四分之一碳水化合物食品。
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The directions can be obtained by removing the quarter-wave plate and following the procedure for plane polarized light or by interpolation.