TABLE OF CONTENTS. xiii 



(e.) MISCELLANEOUS. 



Cement for Rendering Corks Tight, 435 ; Bleaching Shellac by Bone-black 

 and Sunlight, 436; Windhausen Refrigerating Machine, 436; Use of Sul- 

 phite of Soda in Distilleries, 443 ; Cockroach and Cricket Exterminator, 

 449 ; Asphyxiating Burglars, 449 ; Plastic Carbon for Filters, 450 ; Process 

 for Bending Glass Tubes, 452 ; Powdered Gum Arabic, 452 ; Keeping Flow- 

 ers Fresh, 452 ; Regeneration of Oil-paintings, 453 ; Danger of Cleaning 

 Bottles with Shot, 455 ; New Safety Lock, 456 ; Apparatus for Moistening 

 Labels, Stamps, the Fingers, etc., 456 ; Gummed Adhesive Paper, 457 ; Pro- 

 tection of Maps, Pictures, etc., by an Insoluble Coating, 457 ; Production of 

 Ice in Mild Winters, 458. 



L. MECHANICS AND ENGINEERING (cxcii) 459 



(a.) MATERIALS. 



Metals : Gerhard Process for Obtaining Puddled Iron Direct from the 

 Ore, 459 ; Bessemer Steel Establishments in the United States, 459 ; Iron 

 Columns Filled with Concrete, 459; Strength of Perforated Iron Plates, 

 476. Wood: New Method of Preserving Wood, 461; Preservation of 

 Wood, 476. 



(b.) CONSTRUCTIONS. 



Vessels : A New Steamboat Propeller, 470 ; a New Method of Raising and 

 Lowering the Screw of a Propeller, 484. Canals : Canal through the 

 Isthmus of Corinth, 478 ; Filling the Depression in the Desert of Sahara, 

 481 ; Proposed Canal through the Desert of Sardar Abad, 484. Railroads : 

 Checking Uncoupled Cars on a Down-grade, 470. Wagons : Fire-proof 

 Joists, 460 ; Process for Diminishing the Diameter of Iron or Steel Car- 

 wheel Tires, 465. Telegraphs : Attacks on Ocean Cables by Marine Ani- 

 mals, 465 ; System of Optical Telegraphy, 475 ; the Automatic System of 

 Telegraphy, 475. Mines and Mining : Beach-mining for Gold in Cali- 

 fornia, 462 ; Resources of Peru, 463 ; Trial of the American Coal-cutting 

 Machine, 473; Explosions of Fire-damp in Coal Mines, 477. Harbors: 

 Arrangement of the New Harbor of Trieste, 465. Wells : Artesian Wells, 

 466. Rivers : Hydraulics of Great Rivers, 477. 



(C.) MOTORS. 



Fuel : Sawdust as Fuel, 468 ; Heating Power of Weathered Cinders, 470 ; 

 Fuel Burning without Smoke (Pyrolith), 471 ; Petrolate, a New Fuel, 474 ; 

 Russian vejsus Welsh Coals, 480; Hock's Petroleum Motor, 473. Elec- 

 tricity: Lippmann's Small Electro - capillary Motor, 479. Steam: Pre- 

 vention of Boiler Incrustation, 469 ; Heating Power of Weathered Cinders, 

 470 ; Purification of Hard Water for Steam-boilers, 471 ; Condensation of 

 Steam by Cold Surfaces, 472 ; Simplest Steam-motor, 472 ; Steam-pressure 

 Indicators, 482. Explosives : Explosion of Gun-cotton, 468 ; the Sczaroch, 

 478; Cellulose - dynamite, 478. Aeronautics: Scientific Ballooning, 41 ; 

 .Scientific Balloon Ascension, 480. 



(d.) MISCELLANEA. 



The Thirty-fivc-ton Steam-hammer, 483 ; the Use of Amsler's Planimeter, 

 483 ; Fog-signals, 467 ; Danger Notice to Locomotive Engineers, 469 ; Prize 

 for Railway Lamps, 476 ; System of Optical Telegraphy, 475. 



