Mr. Perigal on the Mode of Constnictmg the Pyramids. 409 



The director having walked back again the stone was tilted 

 on to the rollers, and conveyed to its destination at the foot of 

 the Pyramid ; where, perhaps, it was transferred in a similar 

 way to larger rollers. 



Then commenced the lifting process. All but one roller 

 being removed, that one being as nearly as possible under the 

 centre of gravity, the stone was tilted as before, while flat 

 boards or planks were placed beneath ; and upon these boards 

 another very much narrower to act as a fulcrum, all being 

 about the same length, proportioned to the width of the stone. 



The director having walked to the other end the stone was 

 tilted on to the boards, and similar planks were piled beneath 

 by the side or parallel to the others, but a degree higher or 

 more in number ; and upon them also a narrow fulcrum-slip, 

 upon which the stone was then tilted. 



BiiiiBfcwi*.^ 



The director having repeatedly walked backwards and for- 



