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THE POPULAR SCIENCE MONTHLY. 



In every case, too, the Btone which covered the passageway adjoining 

 the chamber and forming part of its wall was of great size. The vari- 

 ation in the length of the passageways is due to their partial destruc- 

 tion. The other dimensions are quite uniform, as will be seen by 

 comparing the following measurements of nine chambers, taken at 

 random : 



The plans vary but little — a single chamber, with the right wall 

 flush with the right wall of the passageway, as in Fig. 3 ; or else the 

 passageway entering the chamber on a median line, leaving a jog on 

 each side, as in Fig. 2. Mr. Ogawa informed me that he had seen one 

 with a small supplementary chamber leading from the end of the larger 

 chamber. 



Fig. 5.— Appearance of Chamber from Passageway. 



The passageway was nearly a foot narrower at the top than at the 

 base, and in some cases was slightly narrower at the entrance. 



In one case only were there signs that the chamber had been used 

 * Passageway partially destroyed. Measurement in feet and inches. 



