230 report — 1859. 



The following Table will show the manner in which the water increased : — 



Throughout the whole depth of boring the rock varied little in character : it was 

 nearly all hard rock ; sometimes very hard, with occasional beds of softer stone. 

 For the last 40 feet or so the soft beds were thicker, but otherwise there was little 

 change from top to bottom. 



The greatest increase of water took place at 214 feet and 227 in depth, at each of 

 which depths there was an increase of 20,000 gallons per day. The soft rock I an- 

 ticipated was not met with at the depth I expected, but sufficient was done to prove 

 the abundance of water. A larger bore-hole, which would permit the ascent of a 

 larger column of water, would materially increase the produce as an artesian well; 

 while a shaft sunk 30 feet or 40 feet deep, and exhausted to that depth by pump- 

 ing, would yield a very considerable quantity. As the whole rock is charged with 

 water to the level of the river which forms its natural outlet, and as the boring 

 shows that the lower beds receive their supplies from distant sources, the supply 

 to be obtained may reasonably be expected to be inexhaustible, within the limits of 

 that which is due to the percolation of the rain upon the collecting area. 



Description of the Glasgow Waterworks, with Photographic Illustrations ta- 

 ken at various stages of the work. By J. F. Bateman, C.E., F.R.G.S., 

 F.G.S. 



On Coal-burning without Smoke, by the method of Steam-Inducted Air- 

 currents applied to the Locomotive Engines of the Great North of Scot- 

 land Railway. By D. K. Clark, C.E. 



The whole apparatus is external to the fire-box, and therefore not exposed to 

 heat, and it is controlled in the most perfect manner by a single stopcock. Air is 

 admitted above the fuel by one or more rows of tubes inserted through the walls of 

 the fire-box, and jets of steam are projected through the air-tubes from nozzies -j^-th 

 of an inch diameter, in small steam pipes, placed outside the fire-box, to increase the 

 quantity and force of the air admitted above the fuel, in order to consume the smoke. 

 The jets of steam are used principally when the engine is standing, with the aid of a 

 light draught from a ring-jet in the chimney, to carry off the products of combustion; 

 and they may be shut off when not required. The supply of air through the tube 

 may also be regulated by dampers. 



The grate-bars are placed close together, with narrow air spaces, and the ash-pan 

 and damper are tightly fitted. The level of the fuel should at all times be below the 

 air-tubes. Bv the adoption of this method it requires a less weight of coal than the 

 engines formerly required of coke for the same duty, and thus saves more than the 

 whole difference in price of the two fuels. 



Description of a Patent Pan for Evaporating Saccharine Solutions and 

 other Liquids at a temperature below 180° Fahr. By Richard Davis, 

 F.S.A., F.L.S. 



This consists of a cast iron, copper, or other pan, through which is inserted a series 

 of copper tubes, similar to those used in a locomotive boiler. On each side of the 



