LIME vs. POWDER. 385' 



Intermediate tubular stanchions or columns pass from the emigrant cabin to a 

 point above the elevated cabin, and are adapted to support the elevated cabin 

 and serve as ventilating shafts for the emigrant quarters. 



Roofing-Tile or Plate. — In this invention the tiles are provided with 

 plain lap-borders, the remainder of their surface having parallel corrugations or 

 ribs rising in relief above the plane of the plain borders, whereby a uniform bear- 

 ing surface is provided. The corrugations are arranged in the direction of the 

 slant of the roof. 



Steam Engine Recorder. — A novel improvement provides a rotary paper 

 carrier, with mechanism for moving it, and a marker with means for imparting to 

 such marker in a given period upward movements corresponding in number to 

 that of the strokes of a steam-engine piston during such period, in order that 

 marks indicative of the number of the strokes may be made by the marker on a 

 sheet of paper moved as described. The paper carrier is capable of being used- 

 for varying pressure of the steam during a stroke of a steam-engine piston and 

 for registering the speed of the engine or number of strokes of its piston in a 

 given time. 



Electric Burglar Alarm. — This novel burglar alarm is so arranged that 

 the opening of a door or window breaks a primary circuit and closes a secondary 

 one. The alarm is kept sounding by the current through the secondary circuit,, 

 and cannot be stopped by closing the door or window. 



Novel Fire-Escape — An ingenious inventor has provided a flexible chute 

 which, when in use is adapted to be anchored at its lower end out in the street 

 by cords so as to make an inclined covered way for the purpose of escaping from 

 the burning building. Weights on the cords which are attached to the upper 

 end of the chute, pull it open when released. When not in use the chute is in- 

 closed in a case in the window-sill, which is held closed by a latch in the window- 

 sash. When the sash is raised it strikes an alarm. 



Device for Hanging Venetian Blinds. — In this invention, to the ends 

 of the heavy top slats are affixed castings with an irregular angular opening in 

 each which governs the position and operation of the blind. The shade, by 

 means of these, may be, with all its attachment&, lifted off or placed upon sup- 

 porting pins in the jambs of the window. 



LIME vs. POWDER. 



On Monday a series of interesting experiments took place in the workings of 

 the Wharncliffe Silkstone Colliery, near Sheffield, the object being to test the new 

 method of winning coal by the use of compressed lime instead of blasting-powder.. 

 Thesecollieries, which are amongst the largest in South Yorkshire, employing: 

 over 600 hands, were opened in 1854, and have been, remarkably free from ex- 



