Proceedings of the Society of Arts for Scotland. 419 



5. For an improved Twyre for the Hot- Blast Furnaces used in 



Scotland for the Manufacture of Iron, so as to prevent the 

 accidents arising from the defects of those at present in use ; 

 — The Silver Medal, value Five Sovereigns. 



6. For a Portable Apparatus for the Manufacture of Gas, to be 



used in lighting Country Houses, or other limited Esta- 

 blishments ; — The Silver 3fedal, value Five Sovereigns. 



7. For a convenient and simple method of increasing or dimi- 



nishing the distance of the Floats from the centre of the 

 common Paddle-Wheels, during the motion of the Vessel, 

 so as to adapt them to changes in the load and draft of wa- 

 ter ; — The Silver Medal, value Five Sovereigns. 



8. For a method of removing the Plaster of Paris from the 



Types, after Stereotyping, without injuring the Types ; — 

 The Silver Medal, value Five Sovereigns. 



9. For a mode of depriving the Mucilage of Fuci and Lichens 



of disagreeable taste and odour ; — The Silver Medal, value 

 Five Sovereigns. 



10. For the best and simplest means of ascertaining the quantity 



of absolute Alcohol in any mixture ; — The Silver Medal. 



11. For an improvement in the methods used in Britain for Cur- 



rying and Tawing certain kinds of Leather, so as to render 

 them equal to those done in France ; — The Silver Medal. 



) 2. For a good Copying Ink, more fluent and permanent than 

 the present ; — The Silver Medal. 



13. The Society will be ready to expend a farther sum in various 

 Pecuniary Prizes, and Honorary Medals — in rewarding other 

 Inventions and Improvements which may be submitted to 

 them ; — or Essays or detailed Accounts of Public or other 

 Undertakings of great National importance, not previously 

 published. 



General Observations. — Communications lodged in competition 

 for the specific Prizes, Nos. 4 to 12 inclusive, are not thereby pre- 

 vented from competing for the Keith Medal. 



The Society eserve to themselves the power of determining 

 whether any coram unicfition be of sufficient merit to entitle it to 

 the Prize for which it competes, and of modifying the amount of 

 the Prize. 



The Society shall be at liberty to publish, in their Transactions, 

 copies or abstracts of all Papers submitted to them. All Models, 



VOL, xxii. NO. xi,\'r. — ocToitKit 1837. !•: c 



