A form is given for an ordinary letter of introduction, to be varied according to circumstances, always bearing in mind that brevity is essential, long acquaintance necessary, and some claim on both parties important, before giving any letters of introduction to your friends and acquaintances. "New York, August 12, 1869. "JAMES WILCOX, ESQ., "Dear Sir:--Allow me to introduce to you my friend, Mr. Loving, who will make a brief visit to your city. Any attention you may be able to show him, during his stay, will be appreciated as a favor by, "Yours sincerely, "E. B. Lyons." (To be directed) "JAMES WILCOX, ESQ., "No. 204 --- Street, "Washington, D.C. "Introducing F. G. Loving, Esq., of New York." In receiving such a letter, bear in mind the courtesy extended is really a compliment to the writer of the letter, and such hospitality and courtesy as you extend you are entitled to claim again for your own friends at some future time. If you are in a position to do so, you should follow your first call by an invitation to dinner, or to meet friends in the evening, and if the new comer is a stranger in the city, select such friends to meet him or her, as will prove agreeable and valuable acquaintances. If your are a bachelor or boarding, and cannot extend the hospitalities of a home, offer your services as guide to points of interest in the city, places of public amusement, in short, extend any courtesy your purse or leisure time will warrant. It is contrary to etiquette for the bearer of a letter of introduction to visit too frequently the house to which he has just been introduced. The fact that Mr. Smith is your only friend in town, and has been cordial in his invitations to "make his house your home," does not justify you in pulling too frequently at Mr. Smith's door-bell, or presenting yourself at unseasonable hours in Mrs. Smith's drawing-room. In travelling abroad it is impossible to have too many letters of introduction. They take up but little room in a trunk, but their value when you find yourself "a stranger in a strange land," cannot be over-estimated. SALUTES AND SALUTATIONS. IN this country men do not embrace each other, nor do they exchange kisses, while, unless amongst intimate friends, even the fair sex now dispense with demonstrative salutations. In many European countries kisses are exchanged, even between gentlemen, and an embrace is quite in accordance with even a somewhat formal salutation. In America, however, these demonstrations are mostly confined to gushing misses and school-girls.