LEWIS'S IMPROVED PORTABLE SYRINGE, which is advertised in this number, will be found on examination and in use to be one of the most perfect instruments in the market. It is so simple and its several parts fit with so much accuracy that there is little chance of its getting out of repair, and its price is so low as to place it within the reach of every family who desire an injecting apparatus. _From the Boston Weekly Dispatch._ IMPROVED PORTABLE SYRINGE, OR DOMESTIC INJECTING APPARATUS; manufactured by Thomas Lewis, Boston.--There has been a great variety of attempts to perfect an instrument of this sort for Domestic Use. The French have led the way. We remember, while in Paris, to have examined a great variety of Syringes, and also while in England. Before leaving Liverpool, we paid £1 for one, which we supposed would never need repair; but it has failed. We have taken great pains to secure the best article in this country; for, to a dyspeptic such as we have been for twenty years, the Syringe is invaluable. In passing through Washington Street, we accidentally met with the instrument now on our table, and which we have tried with complete success. We think we must say that Mr. Lewis has really met the want of the community in producing a Syringe at once portable, simple, and combining all that will be desired. We understand that Dr. Jackson and other eminent physicians of our city have recommended it for general use. We trust Mr. Lewis will be amply rewarded for his excellent labor in the extensive sale of his instrument. Call at 166 Washington Street. _From the Boston Advertiser._ We were shown to-day, an instrument manufactured by Mr. THOMAS LEWIS, 166 Washington Street, which in its operation is superior to any we have ever seen before. It is simple and effective, dispensing altogether with _Leather or Rubber valves_, (which are so liable to get out of order,) and instead round mineral balls are used, these, by the peculiar construction of the parts, can never get out of place, or wear so as to prevent its perfect operation at all times. It is so constructed that it may be used without assistance, and is well adapted to children, as well as adults. The importance of every family having one of these instruments is fully set forth by the testimony of the medical faculty of this city, which is furnished in a small book, which contains full directions, receipts, &c. LEWIS'S IMPROVED ELASTIC SYRINGE. View of Lewis's Improved Elastic Syringe. [Illustration] DESCRIPTION. A--Elastic Bag. B--Metallic coupling, joined to C by a screw. C--Metallic Valve Chamber, containing a Valve. D--Metallic Tube through which the fluid is drawn into the Instrument. E--Metallic Valve Chamber, (discharge valve,) containing a Valve to which is connected by a screw, the flexible tube.