Thomas Jefferson Papers

Notes on Architecture, 12 November 1806

23 May-12 Nov. 1806

[GRAPHIC IN MANUSCRIPT] 5 : 6 :: 3 14. arch bricks to each
5 ) 18 ( 8: 14. windows
 30 56
14 
196 + 14 key bricks


these actual measures rendered it necessary to make each arch a semicircle of 15 I. radius in the clear, with a brick arch of 3. I. thick

order 100. key bricks 3 ¾ I. on the inner or thin edge
900. arch bricks 3. I. on the inner & 3.6 on the outer
3. I. wide & 9. I. long.

May 23. 06.

[GRAPHIC IN MANUSCRIPT]


[GRAPHIC IN MANUSCRIPT]

Nov. 12. 06. ordered 24. from Foxhall

wanted for my iron backs & sides from mr Foxhall

5 pr side pieces 10½ I. wide, & of the height of the inner side piece, with pannels arranged to that

———

a truncated column for my bust. Ionic.

the plinth of the base is 21.75 diam. & is fastened to the pedestal.

the projection of the plinth being 11¼ minutes, we have this proportion. 82.5’ : 21.75 I. :: 60’ : 15.8 I. the diam. of the column

the plinth, 10’ high fastened to the pedestal being deducted leaves 20’=5.26 I. for the upper & lower toms & cavetts, the trunk must be

3. diam.=47.4

  5.26

 2.66 whole height.


½ I.
 1 =  .26[. . .] = .5266
  =  .3291 = .6582
  =  .5924 = 1 .1848
  =  .6582 = 1 .3172
  =  .9873 = 1 .9748
 5. =  1.3166 = 2 .633
 7. =  1.2433 = 3 .6866
  =  1.9748 = 3 .95
  =  2.2381 = 4 .4762
 9. =  2.37 = 4 .74
11¼  =  2.9624 = 5 .9248
23½ =  6.1881 = 12 .3762
41¼ = 10.8624 = 21 .7248
60 = 15.8 = 31 .6

MHi: Coolidge Collection.

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