Dear Charles

I find I cannot draw a ⊙ round your [DIAGRAM HERE] two points, as the difference is so small only about a $\frac{1}{\mathrm{70\; or\; 80}}$ of an inch.

I send you 2 more projections as the more points of view you see it in the better²

I also send you some rhombs cut out, with flaps to fasten over the edges, & I advise you to begin with the flap (A)³

They are not the same size as Millers,⁴ & I do not know if you have any reason for that particular size.

Also a pyramid, with 2 circles on the base to be raised up & the circle on the short diameter will show you exactly how much the obtuse ∠’s are within the sphere

[DIAGRAM HERE] obtuse ∠

12 of these pyramids would make the Dodec.

You will be surprized how firm the model will feel when put together, but dont be in a hurry & let one flap dry before you paste another,

When you have got the model in your hand, & hold them in the same position as my diagrames, they will all become quite clear.

I think I have answered all your questions.

ED

Over the page I will draw another little diagram to fix the positions of the acute ∠^s

[DIAGRAM HERE]

P A W N S E P N E S W – equator S P N P’ – meridian W P E P’ – East & West circle 6 acute angles at the letters 8 obtuse angles (A) in the center of the quadrants

[Enclosure]⁵

[DIAGRAMS HERE]

N^o 1 A d a c f K b C D e B N^o 2 A a C f k b D e B AB vertical axis passing thro’ acute ∠^s A & B CD horizontal axis passing thro’ centers of 2 Rhombs K axis perpendicular to CD & AB or the plane of the paper a b e f rhomb parallel to paper, natural size diameter bf = AC = side of square in ⊙ diameter ae = KA radius of ⊙ a b c d—rhomb oblique to the paper cb is parallel to ae and = $\frac{1}{2}$ ae or Ke

Kc = eb = side of rhomb The obtuse ∠ at c is in the plane of the paper [therefore sign] Kc = radius of ⊙ passing thro’ obtuse ∠^s Kb = $\frac{1}{2}$ distance of centers = distance from center of sphere to rhomb [N^o 2] The same as N^o 1 but turned round the axis AB 45^o. The 4 rhombs are all at ∠ 45^o with paper, but fAfB are the long diameter of the vertical plane, & fC, fD long diameters in the horizontal plane