MECHANICAL AND USEFUL AETS. 91 



ROASTING EY GAS. 



' Mr. S. Harrison has patented an improvement upon that class 

 of Chop Broilers and Meat Roasters which are usually constructed of 

 sheet or cast iron, and are heated by the flame of incandescent car- 

 buretted hydrogen gas. The invention consists of an iron frame, 

 having a lid or cover, so as to reserve the heat or vapours arising from 

 the flame of the gas. The frame is made to rest on four legs or feet, 

 two grooves being attached to the legs or feet to admit a pan or 

 tray made to receive the fat or gravy issuing from the meat, &c. The 

 inner part of the apparatus consists of a main or feeding tubing 

 having more or less tubings connected thereto. The tubings have 

 more or less gas burners or jets fixed therein, and supply tap as may 

 be required. There is an iron convex shell, having more or less 

 points fixed horizontally to an iron frame or grating, over each gas 

 burner or jet, for conducting the heat of the gas burner or jet, and also 

 for destroying the smoke or soot arising from the flame of the gas. 

 The interior of the apparatus may be applied to baking, or to heat- 

 ing apartments. — Mechanics Magazine. 



DISTILLING AND COOKING APPARATUS. 



Messrs. Bathgate and Wilson have patented an improved 

 apparatus for Distilling Water and Cooking on board ship. 



This consists of a parallelogramical or other suitably shaped metallic chest, 

 having a small enclosed fireplace and ashpit about the centre of its length, and a 

 baking oven at one side, with a space left between the sides of the oven and the 

 outer casing that the heat maybe circulated around the sides thereof, and which, 

 may be regulated by a damper or dampers. The top of the outer casing imme- 

 diately above the fireplace, and the flue above the oven, is perforated with holes 

 to receive the bottoms of the cooldng vessels, the said openings being closed by 

 covers when not in use. On the opposite side of the fireplace to that on which 

 the oven is fixed, a small vertical steam-boiler is placed. The patentees form this 

 boiler with flat sides and an arched top, and encompassed by a horizontal me- 

 tallic flanch which is riveted to the boiler about half-way from the bottom. The 

 lower end of the boiler is inserted through a suitably shaped hole in the upper 

 side of the casing or chest, and forms one side of the fireplace, the flanch serving 

 as a saddle, and resting upon the top of the chest. Space between the boiler and 

 sides of the chest admits of the he;;t circulating round the lower portion of the 

 boiler, and which can be controlled by a damper or dampers. One side of the 

 upper portion of the boiler is fitted with gauge-cocks, and the reverse is con- 

 structed with a manhole. The steam-pipe is carried upwards and connected to 

 'a condensing worm placed in a tank which is elevated above the camboose. The 

 worm delivery pipe is carried down to any convenient position, and the distilled 

 water received in a suitable vessel. The boiler is supplied with water from the 

 worm-chest, and the worm-tank is supplied with sea-water by the ordinary 

 ship's force-punips. — Ibid. 



NEW STOVE, OR COOKING APPARATUS. 



At the late meeting of the Eoyal Cornwall Polytechnic Societ}-, 

 Mr. Hearder, of Plymouth, exhibited a new Stove or Cooking Appa- 

 ratus, which is stated to possess the following advantages : — -With 

 the consumption of three-pennyworth of coals a day, it will cook 

 for a family of from twelve to sixteen persons ; second, it requires 

 no extra fire for baking, as, so long as the kettle will boil the fire will 

 bake ; third, vessels will boil on any part of the hot plate ; fourth, 



