Proceedings of the Society of Arts for Scotland. nS 



mistry may be rendered more accessible to all classes of Society. 

 By Dr. D. B. Reid, Lecturer on Practical Chemistry, Edinburs-h 

 and member of the Society of Arts.-The method of operating was 

 Illustrated by expermients. " 



2. On the best Composition for Rollers employed in applying 

 the Ink to the Types m Letter-press Printing; especially with I 

 view to preserve their adhesive and elastic properties in as uniform 

 a condition as possible during damp and other variable states of the 

 atmosphere. By Mr Robert IMuir, of Muir, Gowans and Co. Print- 

 ers 42 Argyll Street, Glasgow.-A specimen roller for trial was 

 exniDitea. 



3. Notice of a new Method of cutting and working Glass by 

 the use of Turpentine. Communicated by Mr John Adie, 58 

 rrince s Street, Edinburgh. 



4 Do.VATioN.-On the Refraction and Polarization of Heat. 

 By James D. Forbes, Esq. F. R. SS. L. & E. and F. G. S., Vice-Pre- 

 sident of the Society of Arts, &c. From the Transactions of the 

 Royal Society of Edinburgh, vol. xiii. From the Author. 



Mr Alexander Crichton, Lithographic Printer, 27 West Register 

 Street, was admitted an Ordinary Member. 



915th J/«rc/j._W.LUAM Macdonald, Esq. of Powderhall, 

 V .P., Ill the cliair. ' 



»,r ^'t '^«^"''P^'«" «f Pi^ddles for Steam-Boats on a new plan. By 

 Mr John Jafiray, Glasgow.— A model was exhibited. 



2. Description and Drawing of a Machine for Sifting and Sizing 

 Tea. Invented by Mr Y^m. Darling, at Mr Ronaldson's, grocer, 

 6 St Patrick Square, Edinburgh — A model was exhibited 



3. Description and Drawing of a New and Improved Method of 

 Raising and Lowering the Venetian Blind, without fixino- the cord 

 .at the various heights. By Mr .John Weir, Venetian BHnd-maker, 

 3d Gordon Street, Glasgow.-One of the blinds was exhibited. 



4. Description and Drawing of Improved Pincers for Drawing 

 IVails. By the same — The pincers were exhibited 



5. Specimens of Drill and other Turning in Ivory and Metal 

 were exhibited. By J. Graham Dalyell, Esq. advocate. Mr 



is SuceT' '"''*''*''' ^^ '^^'""^^ *^^ ^^^''^ '" *''^'^ specimens 



April 8.— James L'Amy, Esq. of Dunkennv, in the Chair. 

 1. Drawing and Description of a New Plan of a Paddle- Wheel for 



Steam Navigatmn. By William Dockar, Esq. Findon, by Banff. 



—A model in brass was exhibited. ^ 



T ^:i '^r^'l'''' ^I'^,^™e"s "f Lithographic Printing. By Mr Samuel 

 Leith Lithographer, Banff, Assoc, s! A. were exhibited, 

 nf Sn.l W T "'"s exhibited, adapted for holding Drills made 

 of SteeMVireof any diameter, within certain limits. By T R 

 ilidinburgh. ^ 



4. Specimens of very minute Engraving on Steel Punches, by 

 Rri."3M.S.^;;^' --'-^'^' ^y J-"- ««•>-«, Esq. Sel 



