642 



EVERYDAY SCIENCE 



wire between your thumb and forefinger into a compact strand 

 that will fit snugly under the screws of the core. 



Slip the cap over the two wires, as in A, Figure 21. Loosen the 

 attachment screws on the core, bend a wire end around each of the 

 -2^: two screws in clockwise direction, and 



fiijT tighten the screws again. 



Replace the shell. If it is attached 

 to the cap by screws, slip the screws 

 into the grooves and turn the shell to 



the ri s ht - If & is the s P rin s type of 



shell, push the upper edge of it into 

 the cap until you hear it click. 



If you succeed in taking a socket 

 apart and wiring it, you will have no 

 difficulty in taking almost any sort of 

 plug apart and attaching wires to it. 

 Just be careful to put the parts back 

 in the order in which you removed 

 them. Figure 21, B, shows one type of 

 attachment plug. 



Two of the most interesting and practical books on electricity 

 for beginners are : 



"The American Boys' Book of Electricity," Charles H. Seaver. 

 David McKay. 



" Harpers' Electricity Book for Boys," Joseph H. Adams. Harper 

 & Bros. 



PROJECT LIX. How to Make the Acquaintance of Trees and Wild 

 Flowers (Independent Project) 



Projects LIX and LX are independent projects, not specifically 

 connected with any particular portion of the text of this book. 

 But in a larger sense, they are very vitally related to the 

 entire book. One of the chief purposes of Everyday Science is 

 to encourage an interest in the great out-of-doors. No one can 



