Sir: Your Portable Syringe, constructed for medical use, combines so much of the needful with the convenient, that I have no doubt of its proving invaluable in many cases where others, from their construction, will be entirely useless. NATHANIEL B. SHURTLEFF. _From Dr. Walter Channing._ BOSTON, DECEMBER 17, 1855. MR. THOMAS LEWIS. Dear Sir: I have examined your Improved Syringe, and find it will perfectly answer the purpose for which it is designed, either for self or family use. WALTER CHANNING, M. D. _From Henry G. Clark, M. D., Surgeon at the Massachusetts General Hospital, and City Physician of Boston._ BOSTON, DECEMBER 11, 1855. MR. THOMAS LEWIS. Dear Sir: I have thoroughly examined the Improved Portable Syringe manufactured by you, and think it one of the very best I have seen. Yours truly, HENRY G. CLARKE. _From Dr. M. S. Perry, No. 16 Rowe Street._ BOSTON, DECEMBER 12, 1855. MR. THOMAS LEWIS. Dear Sir: I received your Improved Syringe, and have examined it very carefully. I think it is all you recommend it to be. Simple and durable in mechanism, and convenient in its form, it is certainly a good family instrument. Respectfully yours, M. S. PERRY. Also recommended by the following distinguished physicians of this city: DR. HENRY J. BIGELOW, Surgeon to Mass. Gen. Hospital. DR. J. V. C. SMITH, Mayor of Boston. DR. D. H. STORER, and many others. _From Dr. Theo. Kittredge, Waltham, Mass._ WALTHAM, DECEMBER 21, 1855. MR. THOMAS LEWIS. Dear Sir: Your Improved Syringe, of which I have made a thorough trial, is the most simple and convenient apparatus I have ever seen, and for durability it cannot be excelled. Its simplicity of construction is certainly of the greatest importance, particularly to country physicians, who are frequently under the necessity of repairing their own instruments, and are greatly perplexed by the common apparatus being so often out of order. THEODORE KITTREDGE, M. D. _From Joseph M. Wightman, Esq., the celebrated Philosophical Instrument Manufacturer, No. 33 Cornhill, who is well known throughout the United States._ BOSTON, NOVEMBER 8, 1855. MR. THOMAS LEWIS. Dear Sir: After a thorough trial of your 'Improved Portable Syringe,' during severe sickness in my family, I am gratified to give my decided opinion in favor of its construction, as admirably adapted to the purpose, and also in regard to the excellent workmanship and convenient arrangement of the various parts. These qualities combined with 'Hard Ball Valves,' which operate as well with those injections of which gruel forms a part, as with those more fluid, render it invaluable to those who are obliged to resort frequently to the use of such an instrument for the purpose, and have suffered from having those of other constructions so often out of order as to be a continual source of annoyance and expense. Yours truly,