ATTEMPT TO CAPTURE CANNON. * _ lt;JAll over the Rhine there was great excitement. Crowds gathered at every corner and discussed the situatiton. Many saloons were open in spite of the Mayor’* proclamation, and the patrons were all talking “fight.” A reportorial stroller came across a gang of a lot of young folks, loaded up to the muzzle with bad whisky, who actually proposed to attack the intrenched militia with Wick-bats. This was at Thirteenth and Walnut. ^They• 4 0got within a block of the canal bridge—which to go upon was almost certain death—when they dispersed.Another crowd of nearly fifty gathered in about the same neighborhood, and marched to the rear of Music Hail. They effected an entrance, and flocked into Power Hall. Their object was not plunder, but to obtain possession of the six-pounders of the Second Battery of the 0. N. 0., of which there ;were about half a dozen. The crowd were busy putting the wheels on the carriages, When they were surprised by Company E, Sixth Regiment, of Lancaster, commanded by Captain Getz, and by Company D, of the same regiment, Iron ton. With the gayg it was egch for himself and the devil take the hindmost. Half a dozen were captured. After the excitement had cooled down and the watching groups on the outside hadt dispersed, the prisoners were quietly takeh by'way of the cannl to the Central Station! Tbs police Sergeant in charge was so busy that he only had time to take down the names of three of ’diem: John Haus, twenty, single, butcher, of (Spring Grove avenue, between Marshall avenue and Spring Grove avenue; Chas. Gilbert, thirty-seven, single, shoemaker, of 320 Third street, and Leonard Hassold, thirty-seven, single, rolling-mill hand, Twenty-first Ward.Companies E and D, tjixth Regiment, remained at Music Hall all night. A hose reel was also rtin out. Ex-Mayor Jacob took great interest in the means adopted to protect Music HalL