380 Proceedings of the Royal Scottish Society of Arts. 



hibited. In this wheel the buckets are not fixed to the periphery of the 

 wheel, but hang loosely on it as a chain, and thus retain the water longer, 

 and consequently are said to give more power. Referred to a Committee. 

 (878.) 



3. Description of a Joiner's Cramp for laying flooring. Invented by 

 Mr John Liddell, Ravensworth Castle, Yorkshire. Communicated by Mr 

 James Milne, F.R.S.S.A. The tool was exhibited and presented to the 

 Society, and its method of operation shewn. Referred to a Committee. 

 (901.)* 



4. Letter from Sir J. Robison, K.H., President R.S.S. Arts, relative to 

 the Disc Engine, Button Shank Machine, Tessalai and Tiles, Apparatus 

 for Distilling Sea-Water, and Electro-Magnetic Power. Thanks voted, 

 (902.) 



9//i May 1842. — Sir John Robison, K.H., President, in the 

 Chair. The following communications were made : — 



1. On Stone and Wooden Pavements. By Mr D. T. Hope, F.R.S.S.A., 

 engineer, Liverpool. Models and Drawings were exhibited. Referred to 

 a Committee. (862.) 



2. Description of " Venetian Pavement" for Halls, Conservatories, &c., 

 made in Edinburgh under the direction of C. H. Wilson, Esq., A.R.S.A., 

 F.R.S.S.A., architect, Edinburgh. Two specimens were exhibited. Re- 

 ferred to a Committee. (893.) 



This flooring is formed of a mixture of Roman cement (in place of Poz- 

 zolano, which is used in Italy), and lime, with small pieces of broken 

 marble of different colours, strewed over the mass while still wet. The 

 marble is beat down to a level, and after the mass has become dry, the 

 surface is brought to a beautiful polish with oil, very much resembling 

 granite. The colour depends very much on the kinds of marble employed, 

 and the whole forms a hard and solid floor, three or four inches thick, 

 without crack or seam. The expense, it was stated, would be nearly the 

 same as Arbroath pavement. 



3. A Paddle-Wheel of a new construction in regard to the distribution 

 of the Floats. By Mr Andrew Carrick, 107 Buchanan Street, Glasgow. 

 A model was exhibited. Referred to a Committee. (858.) 



The Reports of the following Committees were read and 

 approved of, viz. : — 



1. On Mr Yule's Compensation-Governor. Mr Slight, Convener. (819.) 



2. On Mr M. Paterson's Scotch Ultramarine. Mr Wilson, Convener. 

 (828.) 



3. On Mr Burn's Boring Machine. Mr Slight, Convener. (832.) 



4. On Rev. J. Brodie's suggestions for an enclosed Gas Burner* Mr 

 Milne, Convener. (883.) 



IZth June 1842. — Sir John Robison, K.H., President, in the 

 Chair. The following Communications were made : — - 



