Scientific Serials

Abstract

Journal of the Franklin Institute, No. 711, March, 1885.—E. A. Gieseler, on tidal theory and tidal predictions.—Prof. E. J. Houston, glimpses of the International Electrical Exhibition, No. VI. McDonough's telephonic inventions. This gives an interesting account of the instruments invented by McDonough between the years 1867 and 1876, the receiver of which anticipated in all its main features the form of receiver introduced by Graham Bell.—Prof. C. A. Young, physical constitution of the sun; a lecture delivered at the Electrical Exhibition, illustrated with many cuts.—C. E. Fritts, on the Fritts selenium cells and batteries. These cells, in which the light enters through a film of gold-leaf appear to have a much lower resistance than any other selenium cell.—Prof. E. J. Houston, on Delaney's facsimile telegraphic transmission. This number of the journal is also accompanied by reports of the Examiners of certain Sections of the late Philadelphia Exhibition, including electric telegraphs, dental appliances, and applications of electricity to warfare.