Attk.mited Poisoning. A special dispatch from Los Angeles, on June", to the San Francisco Bulletin, tells ot a supposed horrible attempt at poisoning poison-ing the guests of the Bella Union, the principal hotel in the city, by which some forty-five persons were sufferers, though none fatally. Among those affected were Warren Ilussey, Esq., of this city, and his sister. All have recovered. Three employes of the hotel have been arrested, and $.300 have been offered to clear up the mystery.