324 



MANIPULATION. 



well-made pill boxes, and to glue to the bottom, or to the side 

 or cover, a piece of cork, of one or other of the shapes repre- 

 sented by fig. 222. In the first three are seen cylindrical 



Fig. 222. 



pieces glued to the cover, in the fourth is 

 shown a semicircular piece fixed to the 

 side, and in the fifth and sixth a cone and 

 a cylinder attached to the bottom of the 

 box, all of which plans will be found useful 

 for different kinds of objects. 



In order to hold these boxes, he em- 

 ployed a pair of forceps of the shape repre- 

 sented by fig. 223. a is a piece of steel 

 wire, having at each end two pieces of 

 I J' main-spring, h V, those at h have two semi- 



circular pieces of brass rivetted to them to 

 embrace the box, as shown at d, whilst at 

 y the springs are bent as there represented, 

 in order to hold the cover or the bottom of 

 the box in a horizontal position. The wire, 

 a, slides through a short piece of spring 

 tube attached to a joint, c, below which is 

 Fig. 223. a pin for connecting the Instrument to the 



stage of the microscope, as in the case of 

 the other forceps described at page 129. Mr. Jackson has 

 also adopted the plan of mounting opaque objects in pill 

 boxes, but he makes a hole in the bottom of each, by means 



