In nearly all the otlices of the clt;»alcompanies and canal company haveheen placed by Mr. Merwin McKaiglithographic drawings of a steam canal boat, illustrating the advantage* claimed for a patent recently invented by Mr. M. 1». Atkinson, The patent consists of an arrangement by which the propeller may be raised or lowered at will, and is now used by four ol the steamers plying on the canal.