Readme for the Americal System of Dressmaking

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+************************************
+ The American System of Dressmaking
+************************************
+
+The blocks in this directory have been drawn following the instructions
+on `The American System of Dressmaking`_ by miss Pearl Merwin, published
+in 1909.
+
+.. _`The American System of Dressmaking`: https://archive.org/details/americansystemof00merw/page/n3
+
+Measurements
+============
+
+The blocks have been converted to metric measures.
+
+All measurements should be taken on top of basic underwear, including a
+corset, following the instructions given by the book.
+
+Waist
+-----
+
+Measurements used for the waist block (pages 20/21).
+
++----------------------+-----+----------------------------------------------+
+| American System      | Valentina                                          |
++======================+=====+==============================================+
+| 1. Neck measure      | G01 | ``neck_mid_circ``                            |
++----------------------+-----+----------------------------------------------+
+| 2. Bust measure      | G04 | ``bust_circ``                                |
++----------------------+-----+----------------------------------------------+
+| 3. Waist measure     | G07 | ``waist_circ``                               |
++----------------------+-----+----------------------------------------------+
+| 4. Front measure     | P03 | ``neck_back_to_armfold_front_to_waist_side`` |
++----------------------+-----+----------------------------------------------+
+| 5. Back measure      | H19 | ``neck_back_to_waist_back_b``                |
++----------------------+-----+----------------------------------------------+
+| 6. Chest measure     | I03 | ``across_chest_f``                           |
++----------------------+-----+----------------------------------------------+
+| 7. Width of back     | I08 | ``across_back_b``                            |
++----------------------+-----+----------------------------------------------+
+| 8. Under arm measure | H03 | ``armpit_to_waist_side``                     |
++----------------------+-----+----------------------------------------------+
+| 9. Armhole measure   | L19 | ``armscye_circ``                             |
++----------------------+-----+----------------------------------------------+
+| 10. Shoulder measure | I01 | ``shoulder_length``                          |
++----------------------+-----+----------------------------------------------+
+
+Additional measures used in the block and not listed on those pages are:
+
+H37 ``shoulder_slope_neck_side_length``
+   2.5 - 5 cm (shoulder drop);
+G34 ``neck_arc_half_b``
+   6 cm if the neck (G01) is between 30 and 38 cm.
+
+Sleeve
+------
+
+Measurements used for the sleeve (pages 53-54).
+
+.. list-table::
+   :header-rows: 1
+
+   * - American system
+     -
+     - valentina
+   * - 1. Length of sleeve
+     - 014
+     - ``arm_armscye_back_center_to_wrist_bent``
+   * - 2. Length of sleeve from shoulder to elbow
+     - 014 - L03
+     - (as above) - ``arm_elbow_to_wrist_bent``
+   * - 3. Inside measure from armhole to wrist
+     - L08
+     - ``arm_armpit_to_wrist``
+   * - 4. Armhole measure
+     - L19
+     - ``armscye_circ``
+   * - 5. Elbow measure
+     - L13
+     - ``arm_elbow_circ``
+   * - 6. Hand measure
+     - D05
+     - hand_circ
+
+Skirt
+-----
+
+Measurements used for the skirt (pages 133-134).
+
+Here the book does not give names to the measurements, but refers to the
+lines on figures 1 and 2 on pages 28 and 29.
+
++-----------------+-----+------------------------+
+| American System | Valentina                    |
++=================+=====+========================+
+| 1. Line 3       | G07 | ``waist_circ``         |
++-----------------+-----+------------------------+
+| 2. Line 14      | G09 | ``hip_circ``           |
++-----------------+-----+------------------------+
+| 3.              | H35 | ``waist_to_hip_side``  |
++-----------------+-----+------------------------+
+| 4. Line 15      | A13 | ``height_waist_front`` |
++-----------------+-----+------------------------+
+| 5. Line 16      | A05 | ``height_waist_side``  |
++-----------------+-----+------------------------+
+| 6. Line 17      | A23 | ``height_waist_back``  |
++-----------------+-----+------------------------+
+