Society for the Useful Arts in Scotland. 367 



diagram, were read and exhibited. By Thomas Johnstone, Ferenze, 

 Barrhead, Renfrewshire. 



2, A Description and drawing of a simple, cheap, and accurate Rain- 

 Gauge, calculated to show the depth of rain fallen to the ten- thousandth 

 part of an inch, were read and exhibited. By Mathew Adam, A. M. 

 Rector of the Royal Academy of Inverness, and Associate S. A. 



3. An Account of a Phenomenon in Natural History, in the parish of 

 Melrose, illustrated by a variety of specimens, were read and exhibited. 

 By Alexander Sanderson, woollen cloth manufacturer, Galashiels. 



December 23. — 1. Specimens of Shawl Cloth manufactured at Edinburgh 

 with Thibet wool, and dyed with an extract from the flower of potatoes 

 grown in Scotland, as suggested by the Right Honourable Sir John Sin- 

 clair, Bart, were exhibited. The process invented and executed by Messrs 

 G. Page and Co. dyers. Prince's Street. Edinburgh. — Communicated by 

 the Right Honourable Sir John Sinclair, Bart. 



2. A Description and Model of a new mode of Propelling and Directing 

 the Motions of Steam Boats, were read and exhibited. By William 

 M*Cririck, gun-maker, Irvine. 



3. A Description, Drawing, and Model of a Rheontometer or Rheumato- 

 meter, answering the purposes of an Anemometer and Ship's Log, were 

 read and exhibited. By the Reverend .Iames Brodie, Monimail. 



4. Two Anemometers or Anemoscopes, invented some years ago by 

 Andrew Waddell, Esq. of Hermitage Hill, Leith, and now presented by 

 him to the Society of Arts, with a relative description, were read and ex- 

 hibited. 



Mr Charles Atherton, civil engineer, Edinburgh, was admitted an Or- 

 dinary Member. 



The following communications have been read and exhibited to the So- 

 ciety since 1st January 1830 : — 



January 6, 1830. — 1. A description, drawings, and engravings of a new 

 Steam Engine without a Boiler. By Alex. Scott, Esq. Ormiston. See 

 last Number of this Journal, p. 21. 



2. A description anil sketch of a new mode of applying the water or mov- 

 ing power to Barker's mill. By Charles Grey, Esq. 



3. A description and model of a machine for roasting coffee, malt, &c. 

 &c. By William Law, coffee- merchant, Hanover Street, Edinburgh. 



January 20. — 1. A description of an improved Pentagraph, for copying, 

 enlarging, or reducing plans, pictures, &c. By John Dunn, optician^ 

 Edinburgh, M. S. A. , 



2. Observations on the doctrine of impulse. By the Rev. James Brodib, 

 Monimail, Fife, Associate S. A. 



3. A model and description of a Locking Bar, for affording strength and 

 security, principally for shop-doors. By Messrs John and William Greig, 

 smiths. Rose Street, Edinburgh. 



4. A description of a Geometrical Square for cutting coats, with a litho- 

 graphic drawing. By Adam Geddes, tailor, Frederick Street, Edinburgh. 

 The instrument was exhibited. 



William Bonar, Esq, F. R. S. E. was admitted an Ordinary Member. 



