Proceedings of' the Society of Arts for Scotland . 191 
3. A new Press for goods ; by Mr John Ruthven, Edinburgh. 
4. An elevating screw quoin, for pointing heavy guns; in- 
vented by Andrew Waddel, Esq. 
5. Model of a Chinese mangle ; communicated by Andrew 
Waddel, Esq. 
6. A Chinese boat for shrimp-catching ; communicated by An- 
drew Waddel, Esq. 
7. A new mode of striking house-bells without wires or cranks ; 
proposed by the late Professor Robison, and executed by 
Mr James Milne. 
8. An apparatus for raising a block and tackle to be fastened to 
the window of a house on fire ; invented by Mr A. Melrose. 
9. T wo new Achromatic telescopes, constructed by M. Frauen- 
hoffer of Munich. 
1 %£h April. — At a meeting of the Council held this day, a 
list of premiums was prepared for the year 1823-24. This list, 
containing twenty-two subjects, has been extensively circulated, 
and will be found at the end of this Journal. The following 
are a few of the general subjects for premiums. 
In the Mechanical Department 
1. For the most important discovery in mechanics, during the 
season 1823-1824 — The Keith gold medal. 
2. For the best set of experiments on any branch of practical 
mechanics — The Keith silver medal. 
3. For the best set of experiments on the apparatus called 
“ Barker’s Mill,” the tube of the model not to be less than 
4 feet high and 4 inches diameter — An honorary medal . 
4. For the most important communication of useful inventions 
or practices from foreign countries, not yet known or adopt- 
ed in Britain — An honorary medal. 
5. For the most important mechanical invention, applicable to 
agriculture or manufactures — An honorary medal. 
6. For the most economical mode of forming diagrams to illus- 
trate books of science, to be printed along with the text 
or separately — An honorary medal. 
7. For any important improvement in the construction of ba- 
lance, or of pendulum time-keepers, by artists residing in 
Scotland — An honorary medal 
