* # * The degree of amplifying power used is stated at 

 the foot of each figure in diameters, or linear measure. 

 x 500, means that the representation is 500 times longer 

 or wider, measured in one direction only, than the object 

 itself. If the object was i inch in length, the drawing 

 would extend over 500 inches, or would be 41 feet 8 inches 

 long. 



The diameter of any object can be ascertained by com- 

 parison with the scales at the foot of each plate. 



