'l>y^ NEW WATCH ESCAPEMENT. 



Certificate. — We liereby certify, that Mr. Davis's im- 

 provement on doors and shutters, to prevent the pannels 

 from being cut out by house-breakers, is the best that we 

 have ever seen : and we are of opinion, that its being known 

 will be an advantage to the public, and do therefore recom- 

 mend it to the Society for the Encouragement of Arts, 

 Manufactures, and Commerce, for their consideration. 



F. Paynter and Co. Coleman street, 



E. CoLEBACH, Minories. 



J. Teas DALE, Paternoster row. 



W. ROLFE. 



April 22, 1807. 



Reference to the Engraving of Joseph Davis^s Invention for 

 securing Window and Door Pannels, PI. V, Jig. 5, 6, 7. 



Explanation of Fig. 5. Represents a wooden pannel made in the common 

 the plate, way, the dotted lines show the situations of the tempered 

 steel rods within the pannel, the holes through which the 

 rods were introduced on one side being closed up. 



Fig. 6, Shows a section of the same, the small dots in the 

 engraving denoting the place of the rods. 



Fig. 7' Shows the instrument on which the pannels are 

 laid to be bored. The borer passes through the holes L M 

 of the two upright pieces, which keep the borer in a straight 

 line to act upon the pannel laid upon the frame N. 



VI. 



Description of a new Watch Escapement. By Mr, S. Mend- 

 ham, Counter Street, Borough *. 



SIR, 



J'rincii)le of a -'^ ^^^ leave to lay before the Society a model of a new 

 new e cape, escapement, the principle of which is, that the balance acts 

 ^®'^*« without friction, and the movement in itself very simple; 



* Trans, of the Society of Arts, vol. XXV, p.. 108. The silver me- 

 dal of the society was voted to Mr. Mendham for this escapement. 



the 



