572 



INDEX. 



[October, 



Tanning hides, rapid process of, 411 

 Tarn, E. W., "The Student's Guide 

 to the Practice of Measuring and 

 Valuing Artificers Work" (review), 



259 

 Tatem, Mr., mounting diatoms, 276 

 " Technical Educator" (review), 535 

 "Technical History of Commerce" 



(review), 536 

 Telegraph Engineers, Society of, 430 



— singing, 117 



— Steinheil's modification of, 431 

 Telegraphing under difficulties, 116 

 Telescope, Cook's achromatic equa- 

 torial, 561 



— new reflecting, 107 



Temperature, subterranean, 3go 



Testing rails, 396 



Thomson's syphon recorder, 120 



Thorpe, T. E., "A Series of Chemi- 

 cal Problems for use in Schools 

 and Colleges" (review), 382 



Tilghman, B. C, on a new me- 

 chanical agent, a jet of sand, 359 



Timbs, J., " The Year Book of Fads 

 in Science and Art" (review), 372 



Tin, cells of, in microscopy, 553 



Topaz, pyro-electric properties of, 542 



Torpedoes, submarine, 292 



Toselli, M., lasting properties of ice, 

 114 



Townshend jewels, 133 



Traction engines, 547 



Tramway wire, 562 



Transmission, pneumatic, 305 



"Treatise on Magnetism" (review), 

 262 



" Treatise on Terrestrial Magnetism" 

 (review), 531 



Tree, oldest known, 295 



Tungstic acid, elastic compound of 

 glue and, 129 



Tunnel, Mont Cenis, 292 



Two-prism spectroscope, 271 



Tyndall, J., " Fragments of Science 

 for Unscientific People" (review), 

 379 



ULTRAMARINE, artificial, 401 

 Uranus, spectrum of, 414 



VACUUM tubes, stratifications in, 

 280 

 Variscite, mineral, 543 

 Varley, C. F., experiments in dia- 

 magnetism, 120 



— passage of electrical currents 



through rarefied atmospheres, 

 279 



— stratifications in vacuum tubes, 280 



Varley, F., deposition of iron on 

 poles of magnet, 122 



Varley, O, improved DanielPs bat- 

 tery, 122 



Varley's singing telegraph, 117 



Varnish for metals, 411 



Venom of scorpion, 128 



Viaduct, the Kistnah, 394 



Victoria, mineral statistics of, 538 



Volga, ice in river, 284 



WALENN, W. H., electro-deposi- 

 tion of brass, 116 

 Walz, Dr., filter pump, 129 

 War science, 43 



Ward, Dr., on the Podura scale, 274 

 Water, force exerted by freezing of, 



555 

 Waterproofing fabrics, 548 

 Watson, H. W., " The Elements of 



Plane and Solid Geometry" 



(review), 531 

 Watts, W. M., on double spectra, 1 

 Weather, barometrical predictions of, 



123 

 Weighing machine, hydrostatic, 562 

 Weir, R., on submarine torpedoes, 



292 

 Wenham, F. H., on object-glasses 



and their definition, 277 

 Wenzell, W., test for strychnine, 



128 

 West, C, " On some Disorders of 



the Nervous System in Child- 

 hood" (review), 377 

 Wiederkold, Dr., Chinese lacquer, 



130 

 Williams, M., on burnt iron, 391 

 Williams, W. M., the fuel of the 



sun, 435 

 Winkworthite, mineral, 542 

 Winlock, Prof., spectrum of aurora, 



112 

 Woodward, J. J., photographing 



microscopic objects, 274 

 Wootz steel, analysis of, 290 



YEATS, J., "The Natural History 

 of Commerce" (review), 374 



— "The Technical History of Com- 



merce" (review), 536 

 Young, Prof., observations of the 

 solar protuberances, 107 



— photographs of solar protuberances, 



107 



T'INC as fuel, 421 



Zirkel, Prof., fluid cavities in crystals, 

 285 



