The Pawtuxet to be Filtered. After sitting until nearly midnight, Monday, the Common Council of Providence, R. I., passed the resolution appropriating $151,000 for the establishment of the mechanical system of filtration. This sum is in addition to $130,000 previously appropriated. The insurance companies doing business in Wakefield, Mass., have been notified to increase their rates 33 1/2 per cent, on account of the difficulty between the water company and town officials, which has resulted in the removal of a large number of hydrants. he skill and inventive genius of Messrs. J). V. Dyer and Paul I hire!!, who are respectively the civil and mechanical engineers in charge of this work have devised an apparatus which will greatly facilitate the construction of the sewer. The appliance consists of a platform Car, mounted on an elevated track running over the proposed line of the canal a distance of 350 feet. This…