successful. The commission hope, by further experiments, to prove the efficacy of caloric as a specific means of annihilating the miasma.Brazil.—The Times gives news from Brazils to the 12th April. The marriage of the Frincc de Joinville with Donna Francisca, the second sister of the Emperor of Brazil, was already arranged, and would be solemnised on the 1st May. The Princess Januaria, whose hand was supposed to have been the object of the Prince’s voyage, was unfortunately seized with the jaundice before the airival of the Belle Poulc in the harbour of Rio Janeiro ; and the Prince seems to have lost no time in wooing and winning a younger member of the imperial house, whose beauty and accomplishments arc said to be worthy of the most brilliant courts in Europe. This little romance, however, is not unaccompanied by more solid and serious considerations. Private letters assert that the marriage of the Prince of Joinville with the Princess Donna Francisca was to have been solemnised on the 1st of May, and the 10th was fixed for their departure in the Belle Poule for France. The dowry of the Princess was to be upwards of £200,000, of which £20,000 was to be paid in cash, and the remainder in local stock, at 70.The Gazette dc Cologne announces, that the long-pending negotiations between Belgium and Prussia, relative to a reduction in the tariffs, were on the point of being concluded in a satisfactory manner,