54 THE BOOK OF THE LANTEKN. 



illustrate gives a much better light, probably because the 

 two gases are better mixed before reaching the lime. L is 

 the pin upon which the bored lime cylinder rests, and it 

 can be moved to or from the jet by means of the shifting 

 screw S. K is a rod which extends outside the lantern, 

 and which is for the purpose of turning the lime cylinder. 

 The form shown is one commonly met with, and it consists 

 of a rod connected with a bent spiral of wire. I have 

 long ago discarded this arrangement, as it works by fitful 

 starts, and jerks the lime round instead of moving it by 

 degrees. The form of lime-turner attached to the jet 

 shown at fig. 23 is the one to select. 



This form is known as the mixed jet, by which the most 

 powerful form of lime-light is obtainable, but, as already 

 pointed out, it is not so suitable as the one before described 

 for amateur use. Both gases must be under the same 

 pressure, therefore two bags for and H respectively 

 must be employed, usually under the same pressure boards. 

 The jet is safe enough in skilled hands, but is not so, 

 unless care be taken with every detail. The two gases 

 are led to the box or chamber W, where they mix, and 

 impinge upon the lime through the single jet J. D repre- 

 sents a recent improvement which I believe was first 

 suggested by that very good authority on lantern matters, 

 Mr. Lewis Wright ; it deals with the manner of turning 

 the lime cylinder, so that it may not become pitted by the 

 continued action of the jet upon one spot. The primitive 

 plan was to open the lantern door at frequent intervals, 

 and to give the hot lime a hasty touch with the finger. 

 Next the lime pin was furnished with a screw which could be 



