416 Proceedings of theSociety of Arts. 



This Stove was exhibited as a great improvement upon Arnott's Stove. 

 In certain circumstances, such as where there is an ill drawing vent, Ar- 

 nott's Stove is said to have been found not to answer well ; and where 

 it does not succeed, it is highly dangerous to the health, and even the 

 life of individuals. This Stove is intended to remedy these defects ; it 

 is exceedingly cheap, and is elegant in appearance. Mr James Simpson, 

 advocate, who was present, stated that the Stove was originally invented 

 for his use ; he had Arnott's Stoves in some of his bed-rooms, where, in 

 consequence of ill drawing vents, they had injured the health of indivi- 

 duals, and Mr Kirkwood had proposed to him to remedy these defects. 

 He stated, that Mr Kirkwood had perfectly succeeded, and that his 

 apartments now possessed the greatest comfort, with perfect safety, at 

 an expense of a penny a-day. Mr Simpson farther stated, that in 

 another of his rooms he uses an Arnott Stove, which answers there 

 perfectty. 



4. Description and Drawings of a new and self-acting Railway Cross- 

 ing. By Mr John Meiklejohn, 39 Home Street, Edinburgh. Working 

 models were exhibited. (612.) Thanks voted, and referred to a Com- 

 mittee. 



It is well known that where railways cross each other, or diverge from 

 one another, there is both danger and jolting at the crossing. This self- 

 acting switch is intended to remedy these inconveniences, and a very 

 neat model of the simple apparatus, contrived by Mr Meiklejohn, was ex- 

 hibited. 



5. On the proper method of disposing of Panes of Crown Glass in the 

 Frames of Windows. By Sir John Robison, K. H., Sec. R. S. Ed.,— 

 C. S. A. (616.) Thanks voted, and remitted to the Experimental Com- 

 mittee. 



Sir John Robison had experienced the evil of the ordinary way of put- 

 ting in panes of glass, having the convex side outwards. When the 

 action of the wind was strong, as during the late storm, when its pres- 

 sure was nearly 8 lb. on a square foot, the convex side was forced in 

 and rendered concave, and in doing so was broken. It was, therefore, 

 proposed that experiments on this subject should be tried by the Society, 

 and Sir John recommended that the panes should be put in windows 

 with the convex side inwards. 



6. Specimens of Stained Glass, executed in a new style, under recent 

 patents obtained by him. By Mr William Cooper, patent glass manu- 

 facturer, Picardy Place, Edinburgh, M.S. A. (405.) Thanks voted. The 

 specimens were various, and very much admired. 



7. A letter was read from Dr Traill on his Indelible Ink. The speci- 

 men formerly sent to the Society had been takeij by mistake frdta a bottle 

 marked imperfect. (617.) Thanks voted. 



The Committee reported, that, after many experiments, they found that 

 the ink was perfectly indelible, and indestructible, if written on proper 



