iMJPkOVEMEKT IN THE GVit-LOCtt. ?>£ 



The firft experiment made, produced a clear augre-hole but tbe Ja »"ge 

 of the above dimenfions, four yards in depth,, in one hour; durablAole. 

 and the water, which had been pent up in the bog, rofe 

 above the level of the bottom of the ditch, from four to fix 

 inches ; and the bottom of the ditch, which was previoufly 

 very foft, and had begun to fwell and rife, in a few days 

 became more firm and folid, and this in fo great a degree, 

 that when cleared it remained without fwelling or riling in 

 the leaih It will confiderably reduce the expence of draining 

 iuch lands, by rendering them fo firm as to caufe the firft end- 

 drains to ftand. 



The mod proper depth to bore, depends on the fituation. 

 Where the mofs lands lie low, and are in danger of being flooded, 

 no greater depth than what is abfolutely neceffary for draining 

 the fur face mould be bored, as, by deep boring, the land may 

 be funk fo low as to be liable to inundation. 



A. Plate II. Fig. 2. The cutter of the borer, which pene- Defcriptlon. 

 trates the peat. B. The body of the borer, fix inches in 

 diameter. C. The aperture through which the peat in- 

 troduced by boring is drawn out. D. A portion of the iron 

 bar of the borer, to the upper part of which a crofs handle 

 is to be fixed. 



V. 



Defcription of an Improvement in the Gun-Lock by which, the 

 cafual Difcharge of the Piece is prevented. By Mr. John 

 Wkbb*. 



A HAVE taken the liberty offending to the fociety an inven- The inventor* 

 tion of mine, to prevent the accidents which frequently at- letter * 

 tend the ufe of fire-arms, and which may be applied to the 

 gun-locks now in common ufe. It is contrived on fuch a 

 principle, that when it is on full cock, and the trigger pulled 

 in the common manner, it returns to the half cock only, 

 unlefs, at the fame time that the trigger is pulled, the prelfure 

 of the thumb is applied on a fpring placed upon the butt or 

 ftock of the gun ; in which cafe it gives fire in the ufual 



• Tranfaclions of the Society of Arts, 1802. To the Secretary j 

 and the Society gave the inventor a bounty of twenty guineas. 



manner. 



