oflhe Tron Church at Glasgow. 231 



ing. The back of the lamp might be made to represent the city 

 arms, or any other appropriate device. When the clock dis- 

 engaged the gas stopcock, it might also liberate the catch that 

 retains the lamp, and allow it to run in, so that the person who 

 lighted it, would only have to hook up the stopcock, light the 

 lamp, and push it forward into its proper situation for illuminating 

 the dial : a simple folding-piece of three joints, like a foot-rule, 

 would connect the lamp or lamps to the centre or main ga» 



pipe. 



Description of the Plate. 



Fig. 1. is a section of part of the steeple — A, the dial and 

 hands — B, the gas pipe, with C, the flash pipe branching off — 

 DD, Joint on which the branch turns when drawn up — E, stays 

 for its support. 



Fig. 2. shews the means of shutting off the gas — A, the as- 

 cending pipe and main stopcock open, with its hand upon the 

 detent — B, the discharging wheel ; 1, the moveable arm, 2, the 

 detent — C, the hour-hand work of the dial. 



Fig. 3. Section of the reflector and burner — A, glazed cover. 



Art. IV. On the Difference of the Functions in certain 

 Nerves of the Face, illustrated by their Anatomy in the 

 Inferior Animals, and by a comparison of their Uses in 

 Man and Brutes. Bij John Shaw, Esq. 



In a paper published in the last Volume of the Transactions 

 of the Royal Society, Mr. Charles Bell has shewn that two sets 

 of nerves, differing in structure and function, go to the face in 

 man. One of these has the property of controlling the actions 

 of the muscles of the mouth and nostrils in breathing, and 

 of giving expression to the features in emotion ; while the 

 other appears to be for the purpose of regulating the muscles 

 in mastication, and those actions which are independent of 

 respiration and expression, and for bestowing sensibility on the 

 skin. 



