Proceedings of the Societij of Arts. 213 



5. Model, Drawing and Oescrijition cif a Rotating Steam-engine. By Mr 

 James Clark, Craig Court, Argyle Street, Glasgow. 



6. The adjourned debate on Mr Gall's description and explanation of 

 Avery's high pressure rotatory engine, and of Mr Gall's double pressure en- 

 gine was resumed. 



Uil/i J/jHn837.— Sir John Graham DalyeU, V.P. in the 

 Chair. — The following communications were laid before the 

 Society : 



1. Essay on the construction, power, and advantages of Hiero's steam-en- 

 gine. By Edward Sang, Esq. F.R.S.E., Couns. S.A. — Mr Sang endeavoured 

 to shew, in opposition to an opinion he formerly expressed, that this engine 

 working in vacuum, is capable of giving out the whole power of the steam. 



2. An answer to Mr Russell's " Dissertation on the fallacies of the rotatory 

 steam-engine," and to the theoretical objections to Avery's and the new va- 

 cuum engine; with further suggestions as to their improvement. By James 

 Gall junior, Couns. R.P.S., M.S.A. 



3. Description and Drawing of a new method of preventing explosions in 

 si eam-boilers. By Mr John Macfarlane, Fountainbridge. — A model was 

 shewn in illustration. 



4. Donation — Mr Gall, junior, presented three copies of a recent work by 

 him on the " Education of the Blind,'' with specimens of printing for the 

 Blind in the fretted character; also of pictures for the Blind. 



5. Specimens of Flowers modelled in wax. By Mrs Brydie, teacher in the 

 female department of the Academy at Dollar ; were exhibited and much ad- 

 mired for their fidelity in form and beauty of colour. 



James Smith, Esq. of Jordanhill, F.R.SS.L. & E., F.G.S. &c. was admitted 

 an ordinary member. 



The annual abstract of the funds under the management of the Society — 

 being for the year 1835-36 — was laid on the table. 



26C/t April 1837.— Robert Bald, Esq. V.P. in the Chair.— 

 The following communications were laid before the Society : 



1. Model of a Waggon and Railroad Switches, shewing a method of open- 

 ing and shutting the switches by means of the waggon itself, in cross! ng from 

 one line of railways to another, at the pleasure of the waggoner. By Mr 

 David Kemp, Smith, Fox's Lane, Leith. 



2. Descriptions and Drawings of a new method of communicating motion to 

 a shaft lying at an angle. Invented by Mr James Milne, brass-founder, 

 Edinburgh, Couns. S.A. — A brass working model presented to the Society by 



. Mr Milne was exhibited. 



3. Description and Drawing of a plan by which Fuel may be economised 

 By Mr Andrew Symington, Watchmaker, Kettle, Fife. 



4. On the Mucilage of the Fuci, with remarks on its application to econo- 

 mical ends. By Mr Samuel Brown junior, Haddington. Communicated by 

 Mr Alexatider Bryson, Edin. M.S.A. 



6. l-ljiay on the selecting, working, and tempering of Steel. By Mr WiU 



