408 Froceedings of the Society of Arts. 



cording to the quantity consumed. Six of these tubes in use for three 

 hours would, therefore, cost from 9d to Is. 6d., — say an average about Is. 

 Dr Fyfe strongly recommended the use of gjis for heating water baths, 

 particularly in bed-rooms. In the trials he had made he found that a 

 bath which held 24 gallons of water, could be raised from 60 to 100 de- 

 grees by from 17 to 18 feet of gas, at a cost, therefore, of nearly 2d. The 

 gas was burned for this purpose by rose jet-burners attached to a tube 

 passed under the bath, which method of consuming it he prefers to the 

 wire gauze, — the bath was ready in three-quarters of an hour. By using 

 burners sufficiently large, the time may be shortened to half an hour or 

 less if required. Some remarks were afterwards made on the time re- 

 quired for cooking by gas, and also on the necessity of burning coal, so 

 that the whole of the gaseous matter evolved from it shall be consumed 

 by the due admission of air. — Thanks voted, and to be printed in the 

 transactions. 



2. Description and Drawings of his new method of Manufacturing Per- 

 sian Rugs, by which a great saving in material and workmanship is ef- 

 fected. By Mr John Whyte, pattern-drawer, 39 Clerk Street, Edinburgh, 

 M. S. A. Specimens of the Rugs were exhibited. (718.) Referred to a 

 Committee. 



3. There was exhibited a Face-cover for the use of Stone-cutting 

 Masons, intended to prevent the destructive effects of inhaling the dust 

 arising from the stone. By Mr John Bailie, 28 Cumberland Street, Edin- 

 burgh. (719.) Referred to a Committee. 



4. Donation. — The Former and Present State of Glagow. By" James 

 Clelland, LL.D., President of the Glasgow and Clydesdale Statistical So- 

 ciety, Hon. M.S. A., &c. Glasgow, 1840. Presented by the Author. 

 (714.) Thanks voted. 



5. Donation. — Lighthouses; being the article ''Sea Lights" in the 

 Seventh Edition of the Encj'clopaidia Britannica. By Alan Stevenson, 

 LL.B., F.R.S. E., civil-engineer, Edinburgh. Edinburgh 1840. Pre- 

 sented by the Author. (715.) Thanks voted. 



6. Donation. — Observations on the application of Catadioptric Zones 

 to Lights of the First Order in the System of Fresnel : with Tables of the 

 Elements of Zones adapted to these Lights. By Alan Stevenson, LL.B., 

 F.R.S.E., civil-engineer. Edinburgh 1840. Presented by the Author. 

 (716.) Thanks voted. 



I. The Members received copies of the List of Prizes of- 

 fered by tlie Society for Session 1840-41, which they were 

 requested to make as extensively known as possible.* 



II. Motion by Robert Stevenson, Esq. for changing the day 

 of Meeting from WedncFday to Monday, from the commence- 

 ment of next Session, which was carried nearly unanimously 

 at last Meeting, was at this Meeting carried unanimously. 



• Vidttp. 412. 



