210 MICROSCOPIC OBJECTS. 



object, it can only do so in a horizontal direction ; you 

 must get the opposite motion by moving the body verti- 

 cally by means of the cradle-joint, or by hfting the rod m, 

 fig. 1, up and down in the socket. 



It will not be found that (though the stage in this con- 

 struction is frequently stilted up very high,) any tremor 

 will be produced, because it is always stationary ; neither 

 will it be very hable to be knocked down, for the foot of 

 the pillar a, is made of pewter, and may be made as heavy 

 as we like. 



It wiU be observed as a peculiarity in the mounting of 

 the Megaloscopic Engiscope, that the illuminative appa- 

 ratus, as well as the stage, is in all cases detached from 

 the body — an arrangement which seems to me to yield 

 many facilities and comforts to the observer in a variety 

 of instances, without doing any mischief. For my own 

 part, were it not for the weight of the instrument, and 

 the fatigue and inconvenience of perpetually holding it in 

 my hands, I could use it on opaque objects without any 

 other apparatus than fastening it to a slip of wood ; but I 

 have always found that when the body, or any part of it, 

 is constrained or incommoded, we never can observe any- 

 thing wdth exactness, and what ought to be a pleasure and 

 amusement becomes a wearisome task. 



THE END. 



f. DAREIN, PBINTER, 2, CLOVD£SLEY-STR££T, ISLINGTON. 



