1806.] Premiums in weight to be raised or lowered; the gold me- dal, or thirty guineas. The model on a scale of not less than one inch to a foot, with‘a proper Certificate thatthe machine at large has been employed to good effect, to be produced to the Society on or before the second Tuesday in February, 1807.

124. MAcHINE FOR RAISING WATER. To the person who shall invent a machine on a better, cheaper, and more sìmple construction than any hitherto known or in use for raising water out of wells,&c. from a depth of not less than fifty feet; the gold medal, or forty guineas. Certificates of the performance of the machine, and a model of it, on a scale of not less than one inch to a foot, to be Ppro- duced to the Society on or before the first Tuesday in February, 1807.

125. Erar P1PrEs. To the person who shall inyent and discover to the Society a substitute for the elm pipes now mm common use for the côónvyeyance of water, which shall be cheaper, equally&éfffectual, and more durable than any heretofore employed; the gold medal, or thirty guineas. Itis required that one of the pipes s0 employed, an accurate account of the method used, and every expense attend- ing it, together with satisfactory accounts of its being effectual, be delivered to the Society on or before the second Tuesday in January, 1807.

126. Lavixc WoonDevx Pryxs. To the person who shall invent and discover to the Society a superior method of laying or cou- necting the wooden pipes now in use for con- vyeying water s0 as‘to lessen the injury they receive thereby; the sìilver medal, or fifteen guineas.

It is required that a model, an accurate account of the method used, and every ex- pense attending it, together with satisfactor y Certificates of its bemg efffectual, be deli- vered to the Society on or before the second Tuesday in January, 1807.

127. ExrTINGuI1sHING FIRES. To the per- s0n who shall produce to the Society the best and most efffectual method of procuring an immediate supply of water in case of fire, or for the means best calculated to prevent or extincuish accidental fires in buildings, supe- rior to any now in use; the gold medal, or thirty guineas. Certificates of the method liaving been practised with success, with a full description thereof, to be delivered to the Society on or before the second Tuesday in January, 1807.

128. BoRING aND BLASTING Rocks, To the person who shall discover to the Society a more simple, cheap, and expeditious method than any hitherto known or in use of boring or blasting rocks in mines, shafts, wells,&c.; the gold medal or thirty guineas. Certifi- cates of the method having been practised with success, with a full desription thereof,

Mechanicks. 57

to be delivered to the Society on or before the first Tuesday in January, 1807,

129. HearT1iNG Roos FOR THE PURPOSE or MaNuF:.cTURERS. To the. person who shall invent and discover to the Society a method of heating rooms, superior to any hitherto known or in use, and at a moderate expense, for the purposc of painters, japan- ners, and other manufacturers, s0 as to avoid the necessìty of iron or copper tunnels going through the rooms to convey the smoke, where- by the danger from such tunnels may be pre- vented; the gold medal or forty guineas. A model or complete drawing and description of the method, with Certificates that it has been successfully practised, to be delivered to the Society on or before the last Tuesday in March, 1807.

130. TuerRoveD VENTILATION. To the person who shall invent and produce to the Society a mode of permanently ventilating the apartments in hospitals, workhouses, and other crowded places, superior to any now known or used; the gold medal, or fifty guineas, A model of the apparatus, and a full account ofthe means by which the efect has been pro- duced, with proper Certificates, to be delivered to the Society on or betore the last Tuesday in February, 1807.

131. PREVENTING ÁCcCIDENTS FROM HoRsES FALLING WITH TWO-WHEEILED CAaRRIAGES. To the person who shall invent and produce to the Society a method superior to any hitherto known or in use, to prevent accidents from the falling of horses with two- wheeled carriages, especially on steep decli- vities; the silver medal, or fifteen guineas. À model of the apparatus, and a full account of the means by which the efect has becu praduced, with proper Certificates that the same has been used with success, to be de- livered to the Society on or before the second Tuesday in January, 1807.

132. TuPrRovING TURNPIKE ANDOTIEN Roans. To the person who shall discover to the Society the most effectual and cheapest method, verified by actual experiments, of combining the materials ordinarily employed in making or repairing roads, s0 as to form them of the hardest consistency by their ce- menting properties, or by an arficial mixture of earth, stones,&c. altered by heat or any other‘mode,$0 as to form an even, hard, and durable carriage-road, not liable to be injured by heat 0 rain; the gold medal, or fifty gui- neas. Ît 1s required that an accurate account of the method used, and every expense at- tending it, together with satisfactory Certifi- cates of its being effectual, be delivered to the Society on or before the ſirst Tuesday in March, 1807.

133. CLeaNsING CHInuNIEs,. To the per- s0N who shall invent and produce to the So- ciety the most efffectual mechanical or other