How made, adjusted, and operated by any person. Send stamp for full and interesting description, with illustrations and instructions. One pair first-class Telephones complete, except diaphragms, sent to any address upon receipt of $5. J.H. BUNNELL, Electrician, 112 Liberty St., New York. ---------------------------------------------------------------------- IMPORTANT FOR ALL CORPORATIONS AND MANF'G CONCERNS.--=Buerk's Watchman's Time Detector=, capable of accurately controlling the motion of a watchman or patrolman at the different stations of his beat. Send for circular. =J. E. BUERK, P. O. Box 979, Boston, Mass= N. B.--The suit against Imhaeuser & Co., of New York, was decided in my favor, June 10, 1874. A fine was assessed against them Nov. 11, 1876, for selling contrary to the order of the court. Persons buying or using clocks infringing on my patent will be dealt with according to law. ---------------------------------------------------------------------- THE HUGHES TELEPHONE. SIX FIGURES. Sound converted into Undulatory Electrical Currents by Unhomogeneous Conducting Substances in Circuit. The Simplest Telephone and the most sensitive Acoustical Instrument yet constructed. Instrument for Testing the Effect of Pressure on Various Substances. Astonishing Experiments which may be performed by any person with a few nails, pieces of sealing wax, a glass tube containing powders, and a few sticks of charcoal. Contained in SCIENTIFIC AMERICAN SUPPLEMENT NO. =128.= Price 10 cents. To be had at this office and of all newsdealers. ---------------------------------------------------------------------- [Illustration: MEDAL & PREMIUM AWARDED TO ALCOTT'S TURBINE WATER WHEELS]