Proceedings of the Society of Arts for Scotland. £15 



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

 By Dr. D. B. Reid, Lecturer on Practical Chemistry, Edinburgh, 

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

 illustrated by experiments. 



2. On the best Composition for Rollers employed in applying 

 the Ink to the Types in Letter -press Printing ; especially with a 

 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 Muir, of Muir, Gowans and Co. Print- 

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

 exhibited. 



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

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

 Prince's Street, Edinburgh. 



4. Donation. — On tbe 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. 



25th March. — W illiam Macdonald, Esq. of Powderhall, 

 V .P., in the chair. 



1. Description of Paddles for Steam-Boats on a new plan. By 

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



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

 Tea. Invented by Mr Wm. 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 fixing the cord 

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

 35 Gordon Street, Glasgow One of the blinds was exhibited. 



4. Description and Drawing of Improved Pincers for Drawing 

 Nails. By the same. — The pincers were exhibited. 



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

 were exhibited. By J. Graham Daly ell, Esq. advocate. Mr 

 Dalyell described the process by which the effect in these specimens 

 is produced. 



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



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

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

 — A model in brass was exhibited. 



2. Twelve Specimens of Lithographic Printing. By Mr Samuel 

 Leith, Lithographer, Banff, Assoc. S. A. were exhibited. 



3. A Drill Stock was exhibited, adapted for holding Drills made 

 of Steel Wire of any diameter, within certain limits. By J. R. 

 Edinburgh. 



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

 Bourguing of Paris, were exhibited by John Robison, Esq. Sec. 

 R.S.E. and M.S.A. 



