Letter to the Dublin Society on Wheel-carriages. 83ders the deepest and most valuable coal-mines securely accessible to the workmen. If the Romans decreed a civic crown, to the man who saved the life of a single fellow-citizen, what gratitude is due to him, whose genius has afforded the means of saving hundreds from a horrible death, and their families from hopelessindigence! I am, dear sir,Your very obedient servant,London, July 29, 1816. ANDREW UrE.The engraver of the wood-cut of Sir H. Davy’s lamp has not been able to represent the decussations of the wire-cloth. KK are the rings by which it is suspended to the belt of the miner; H is the metal disc at top, to which is attached thecVmrfr /Mrlinrlor nf uurA-r'lnfli fi