■V 309 : 



' PROCEEDINGS OF SCIENTIFIC INSTITUTIONS. 

 EDINBURGH. 



The Royal, the Wemerian, and the Royal Physical Societies, have terminated 

 their Sessions. 



Society of Arts for Scotland — The following communications have been read 

 and exhibited to the Society since 17th February 1830 : 



3d Marth 1830. Ist, a model and description of a cart to be propelled by le- 

 vers and cranks, acted on by the weight and force of one man, without a horse. 

 By William Allan, Morningside. 



2d, Description of a slow motion for the beam compass. By Mr. Edward 

 Sang, teacher of mathematics, Edinburgh, M.S. Arts. 



17th March. 1st, An account of the latest improvements in the turning lathe, 

 including the slide-rest, and apparatus for drill-turning ; as also an account of 

 the planing-engine and apparatus, with engravings. Communicated by John 

 Robison, Esq. Sec. R.S.E. and M. S. Arts. 



■ 2d, Drawing and description (as amended) of a simple, cheap, and accurate 

 rain gage. By Matthew Adam, A. 31. rector of the academy of Inverness, and 

 Assoc. S. Arts. 



3d, Description of a pendulum chronometer, in which the arbors of the wheels 

 move on friction rollers, and the pinion leaves are made so as to revolve by the 

 rmpulse of the wheel teeth, which are of a peculiar form. Made by David 

 Whitelaw, watch and clock maker, 16, Prince's Street, Edinburgh, for the late 

 Andrew Waddell, Esq. Hermitage Hill, Leith. Communicated by Mr. Wad- 

 dell. 



31st March. 1st, Observations on the application of heated air to the warm- 

 ing of dwelling-houses, and of churches, hospitals, and other public buildings ; 

 with remarks on various kinds of stoves used for this purpose. By Mr. Robett 

 Ritchie, ironmonger to his Majesty, High Street, Edinburgh. Models of the 

 stoves, &c. were exhibited. 



2d, Description of an improved levelling rod. By Mr. James Flint, civil en- 

 gineer. Terrace, Edinburgh. The rod was exhibited. 



3d, Additional observations on safety windows for upper stories of houses. By 

 Thomas Johnston, ink -manufacturer, Glasgow. 



I4th April. 1st, Remarks on the eidograph, pentagraph, &c. were read; by 

 Mr. Professor Wallace, F.R.S.E. and Memb. S. Arts, The instruments were 

 exhibited. 



2d, Notices of various plans of applying heat, either by common fire-places, or 

 by steam apparatus, were communicated. By Mr. Robert Ritchie, ironmonger 

 to his Majesty, High Street, Edinburgh. Models of various stoves, &c. and of 

 a drying-house, were exhibited. 



3d, Notice of an apparatus for facilitating the making of infusions by hot wa- 

 <er, and particularly from coffee. By John Robison, Esq. Sec. R. S. E. and 

 M. S. Arts. 



28th April. 1st, Notice respecting Mr. Cuthbert's elliptic metals for reflect- 

 ing microscopes. Communicated by Dr. Brewster, F.R.S.E. and M.S. Arts. 



2d, Investigation of the spherical aberration of a diamond lens. By Mr. 

 Andrew Pritchard, London, Hon. IMemb. S. Arts for Scotland. Conminnicated 

 by Dr. Brewster, F.R.S.E. and M.S. Arts. 



3d, Description of the improvements of the common mortice lock. By Mr. 

 James Williamson, Melrose, Assoc. Soc. Arts. The lock was exhibited. 



4th, Description of a method of destroying vermin on fruit trees, bugSj &c. by 

 means of steam. By James Grieve, coppersmith and brazier, 20, Greenside 

 Place, Edinburgh. The apparatus was exhibited. 



