On the IVire-ganze Safety -lamps for Miners. 5 1 



land purchased of him at the two ends of Loch Oich, our trans- 

 actions relative to the purchase of land have been terminated. 



The a;nount of rent to be paid bv us for the Redcastle quarry 

 is to be determined under the direction of the court of session 

 by ^^'il]iam Fraser Tytler, esq. siicriff depute of the county of 

 Inverness. 



Accounts. The amount of onr expenditure to the end of 

 April 1816, appears to have been five hundred and ninety-four 

 thou<a!id pou.nds ; twentv-five thousand pounds in full of the 

 jrrant of tlie last session of parliament is now payable to us at 

 His Maje=^ty's Exchequer. 



The account inserted in th.e Appendix is similar to all our pre- 

 ceding accounts ; and the series is in such form as to embrace ap 

 extensive classification, and alvvavs to show the expenditure of 

 the precediiiir twelvemonth, as well as of the total expenditure 

 to the present time. 



Mr. 'IVlford's accounts and vouchers have been examined and 

 passed by our accountant to the 12th day of August last; every 

 part of our expcnditiue which does not pass through Mr. Tel- 

 ford's hands, is paid by ourselves, and audited under the direction 

 of the Lords Commissioners of the Treasury, 



Charlks Abbot. 



N. Vansittart. 

 Jlav ir, 131G. W. Grant. 



Castlereagh. 



Melville. 



Binding. 



Charles Grant. 



I. H. Browne. 



XVI. yi fciv additional practical Ohsemations on the IVire- 

 Gauze Safcty-lMmps for Miners. IVith some Evidence of 

 their U^e. By Sir Humi'hry Daw. 



1 HAVE already published an account of the researches which led 

 me to discover that explosion and flame are^incapable of passing 

 through tubes and apertures, which are nevertheless veiy perme- 

 able to l)oth li;j;ht and air, and I have described several contri- 

 vances far lighting coal-mines, in which inflannnable air h disen- 

 gaged, all founded on the same principle of security. 



The lamp which has i)een found most convenient for the miner, 

 i^ that composed of a cylinder of strong wire-gauze fastened round 

 the flame by a screw, and in which the wick is trimmed by a wire 

 passing through a safe aperture. 



Lamp^ of this construction have been commonly used in tho 

 D 2 most 



