What signifies Philosophy that does not apply to some Use? May we not learn from hence, that black Clothes are not so fit to wear in a hot Sunny Climate or Season, as white ones; because in such Cloaths the Body is more heated by the Sun when we walk abroad, and are at the same time heated by the Exercise, which double Heat is apt to bring on putrid dangerous Fevers? That Soldiers and Seamen, who must march and labour in the Sun, should, in the East or West Indies have an Uniform of white? That Summer Hats, for Men or Women, should be white, as repelling that Heat which gives Headaches to many, and to some the fatal Stroke that the French call the _Coup de Soleil_? That the Ladies' Summer Hats, however, should be lined with Black, as not reverberating on their Faces those Rays which are reflected upwards from the Earth or Water? That the putting a white Cap of Paper or Linnen _within_ the _Crown_ of a black Hat, as some do, will not keep out the Heat, tho' it would if placed _without_? That Fruit-Walls being black'd may receive so much Heat from the Sun in the Daytime, as to continue warm in some degree thro' the Night, and thereby preserve the Fruit from Frosts, or forward its Growth?--with sundry other particulars of less or greater Importance, that will occur from time to time to attentive Minds? Sometimes he exchanges language like this for such bantering questions as these: "Have you finish'd your Course of Philosophy? No more Doubts to be resolv'd? No more Questions to ask? If so, you may now be at full Leisure to improve yourself in Cards." Another letter, dated June 7, 1762, was written in contemplation of the fact that he was about to leave the Old World for the New. I fancy I feel a little like dying Saints [he said], who, in parting with those they love in this World, are only comforted with the Hope of more perfect Happiness in the next. I have, in America, Connections of the most engaging kind; and, happy as I have been in the Friendships here contracted, _those_ promise me greater and more lasting Felicity. But God only knows whether these Promises shall be fulfilled. Then came the letter written to her from a "wretched inn" at Portsmouth when he was on the point of embarking for America. It is none the less noteworthy because it reveals the fact that the thought of a marriage between Polly and his son had been a familiar one to him and her.