Fig. 50. Cheops from points bearing ° ′ ″ S 19.12.22 W W 19.12.22 N N 19.12.22 E E 19.12.22 S Fig. 51. Cheops from points bearing ° ′ ″ S 19.12.22 E W 19.12.22 S N 19.12.22 W E 19.12.22 N Fig. 52. Cephren from points bearing ° ′ ″ S 23.7.50·24 W W 23.7.50·24 N N 23.7.50·24 E E 23.7.50·24 N Fig. 53. Cephren from points bearing ° ′ ″ S 23.7.50·24 E W 23.7.50·24 S N 23.7.50·24 W E 23.7.50·24 N Fig. 54. Mycerinus from points bearing ° ′ ″ S 17.1.40·4 W W 17.1.40·4 N N 17.1.40·4 E E 17.1.40·4 S Fig. 55. Mycerinus from points bearing °- ′ ″ S 17.1.40·4 E W 17.1.40·4 S N 17.1.40·4 W E 17.1.40·4 N * * * * * Fig. 56. Cheops model. Fig. 57. Cephren model Fig. 58. Mycerinus model * * * * * I recommend any one desirous to thoroughly comprehend these matters, to make a plan from my diagram, _Figure_ 5, using R.B. cubits for measures, and to a suitable scale, on a piece of card-board. Then to cut out of the card-board the squares of the bases of the pyramids at the level of Cephren, viz., 420, 420 and 218 cubits respectively, for the three main pyramids. One hundred cubits to the inch is a convenient scale and within the limits of a sheet of Bath board. By striking out the models on card-board in the manner shown by diagrams (_see Figures_ 56, 57, and 58) they can be cut out with a penknife--cutting only _half through_ where the lines are _dotted_--bent up together, and pasted along the edges with strips of writing paper about half an inch wide. These models can be dropped into the squares cut out of the card-board plan, thus correcting the error caused by the thickness of the card-board base, and if placed in the sun, or at night by the light of _one_ lamp or candle properly placed to represent the sun in the eastward or westward, the clear cut lines and clear contrasting shades will be manifest, and the lines illustrated by my figures can be identified. When inspecting the model, it is well to bear in mind that the eye must be kept very nearly level with the table, or the pyramids will appear as if viewed from a balloon. * * * * *