[The relations of sides and angles cannot be obtained without trigonometry in some shape. A very easy work has lately been published by Mr. Hemming, in which there is as little as possible of technical trigonometry.] _Meaning of Ratche._--In John Frith's _Antithesis_, published in 1529, he says: "The pope and bishops hunt the wild deer, the fox, and the hare, in their closed parks, with great cries, and horns blowing, with hounds and _ratches_ running." I should be glad to have the word _ratches_ satisfactorily explained. H. W. [From a note by Steevens on the line in _King Lear_ (Boswell's _Shakspeare_, vol. x. p. 155.), it appears that the late Mr. Hawkins, in his notes to _The Return from Parnassus_, p. 237., says, "That a _rache_ is a dog that hunts by scent wild beasts, birds, and even fishes, and that the female of it is called a _brache_:" and in _Magnificence_, an ancient Interlude of Morality, by Skelton, printed by Rastell, no date, is the following line: "Here is a leyshe of ratches to renne an hare." In a following note, Mr. Tollet, after saying "What is here said of a _rache_, might, perhaps, be taken from Holinshed's _Description of Scotland_, p. 14.," proceeds, "The females of all dogs were once called _braches_; and Ulitius upon Gratius observes, 'Racha Saxonibus canem significabat unde Scoti hodie _Rache_ pro cane foemina habent, quod Anglis est _Brache_.'"] _"Feast of Reason," &c._--Seeing your correspondents ask where couplets are to be found, I venture to ask whence comes the line-- "The feast of reason and the flow of soul." I have often heard it asked, but never answered. H. W. D. [It will be found in Pope's _Imitations of Horace_, Book ii. Satire i.: "There St. John mingles with my friendly bowl The feast of reason and the flow of soul."] _Tu Autem._--In page 25. of "Hertfordshire," in Fuller's _Worthies_, there is a story of one Alexander Nequam, who, wishing to become a monk of St. Alban's, wrote thus to the abbot thereof: "Si vis, veniam. Sin autem, tu autem." To which the abbot replied: "Si bonus sis, venias. Si Nequam, nequaquam." Can any of your readers inform me of the meaning of "tu autem" in the first line? as I have been long puzzled. This puts me in mind of a form which there was at Ch. Ch., Oxford, on "gaudy" days. Some junior students went to the "high table" to say a Latin grace, and when they had finished it, they were dismissed by the Dean saying "Tu autem;" on which, I remember, there was invariably a smile pervading the faces of those present, even that of the Dean himself, as no one seemed to know the meaning of the phrase. I believe that it was in my time an enigma to all. Can any of your ingenious readers solve me this? H. C. K. ----Rectory, Hereford.