t6B 



SCIENCE. 



[Vol. XV. No. 370 



'of the numerous applications, such as streetcars, mills, factories, 

 private dwellings, and public buildings; in fact, wherever a 

 bell is needed. These bells may be made to vibrate or make 



^single strokes, as desired. This bell, which is extensively 

 used in England, is being introduced into this country by Mr. 



"C. M, Lyman of the Eureka Electric Company of this city. 



The Robes Improved Shaft-Coupling, 



Theee was on exhibition at the late Maritime Fair in Boston 

 -^ most interesting and valuable mechanical device, of which 

 we present an illustration. This invention has for its object to 

 provide a universal shaft-coupling of simple construction for 

 «onnecting shafts placed at a variety of angles or at different 



mediate connecting shaft, and they are coupled with the shafts 

 by a pair of oscillating or rocking bars, each pivoted at its 

 centre on a pin or bolt within the slotted end of one of the 

 shafts, in line with the axis, and having its opposite ends 

 pivoted or journaled within the adjacent jaws of the coupling 

 link. By this arrangement the power is transmitted from one 

 shaft to the other in a direct axial line, and a steady and 

 uniform motion insured under all conditions. All those who 

 have had to labor with the appliances of the past for bringing 

 about the same end must certainly be pleased with this for- 

 ward step in mechanics. 



A visitor to the exhibition who was interested in mining 

 was impressed with the great value of this device in being so 



THE ROBES IMPEOVED SHAFT-COUPLING. 



levels, or both, and which will be noiseless in its action, and 

 will transmit motion steadily from one shaft to another with 

 a, perfectly uniform and regular speed without regard to the 

 load, thus avoiding the sudden jerks and irregular motion 

 common to universal shaft-couplings as heretofore constructed, 

 and which have rendered them unsuitable for general purposes. 

 The invention consists in the combination, with a pair of 

 shafts adapted to run at different angles or levels, or both, 

 and each having a slot at its extremity, of an intermediate 

 connecting shaft supported in suitable bearings between the 

 ends of the two main shafts, and having a slot at each end, 

 and a pair of coupling-links or connecting pieces bifurcated 

 at each end to form jaws. One" of these is arranged between 

 each of the main shafts and the adjacent end of the inter- 



readily adjusted to all the varieties of angles required in 

 working a mine, and intimated his intention of using one as 

 soon as possible. Another visitor claimed that it would 

 entirely obviate the well-known difficulty among the builders 

 of rnarine engines in adjusting the propeller-shaft to the 

 engine, the adoption of the coupling rendering the absolutely 

 straight shaft from engine to propeller unnecessary. Another 

 thought it exceedingly useful in enabling a canal-boat to be 

 lifted over sand-bars and other obstructions of like character. 

 There are two or more in use in Boston at present, one of 

 which has been running for three years, another two years ; 

 and both are giving perfect satisfaction. Further information 

 may be had on application to the Wyman Machine Company, 

 326 Devonshire Street, Boston. 



SCOTT'S 



FMULSiON 



Of Pure Cod Liver Oil with 



Hypophosphites 



Of Lime and Soda. 



There are emulsions and etnulsionSf 

 and there is still much shimmed tuilfe 

 which masqiterades as cream, Trij as j 

 iheif will inany manufacturers cannot 



I so disguise their cod liver oil as to mahe 

 it palatable to sensitive stomachs, Scott's 

 EinuUion of PURE NORWEGIAN COO 



. LIVER OILf cotnbincd with Hypophos- 

 phites is almost as palatable as milk. 

 Eor this reason as well as for the fact i 

 of the stimulating qualities of the Hypo- 

 phosphites, Fhysidans frequently pre- 



] scribe it in cases of 



SCROFVl-A, BRONVHIj:iS and 



CHRONIC COVGM or SEVERE COLD. 



All Druggists sell it, but be sure you get 



' the gemiine, as there are poor imitations. 



A New Method of Treating Disease. 



HOSPITAL REMEDIES. 



What are they ? There is a new departure in 

 the treatment of disease. It consists in the 

 collection of the specifics used by noted special- 

 ists ofEurope and America, and bringing them 

 within the reach of all. For instance, the treat- 

 ment pursued by special physicians who treat 

 indigestion, stomach and liver troubles only, 

 was oblained and prepared. The treatment of 

 oilier physicians celebrated for curing catarrh 

 was procured, and so on till these incomparable 

 cures now include disease of the lungs, kidneys, 

 female weakness, rheumatism and nervous de- 

 bility. 



This new method of "one remedy for one 

 disease " must appeal to the common sense of 

 all sufferers, many of whom have experienced 

 the ill effects, and thoroughly realize the ab- 

 surdity of the claims of Patent Medicines which 

 are guaranteed to cure every ill out of a single 

 bottle, and the use of which, as statistics prove. 

 kas I uined viore stomachs than alcohol. A cir- 

 cular describing these new remedies is sent free 

 on receipt of stamp to pay postage by Hospital 

 Remedy Company, Toronto, Can"ada, sole pro- 

 prietors. 



ESTERBROOK'S 

 STEEL PENS. 



Of SUPERIOR AND STANDARD QUALITY. 

 Leading Nos.: 048, 14, 130, 135, 239, 333 



For Sale by all Stati07iers. 



THE ESTERBRQOK STEEL PEN CO., 



Works ; Oamden, N.J. -iS John St., New York. 



PHYSICAL, ELECTRICAL 



APPARATUS 



Of High Grade. 



FOR SCHOOLS AlVD COLLEOES. 



Send foe List of Catalogues. 



QUEEN & CO, Philadelphia. 



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 will confer a great favor by mentioning the paper. 



