Folio page 71r
Written by Galileo; contains drawings, short texts. Relation to the Discorsi: elaboration of 2/14-pr-02.

Folio page 71v
Written by Galileo; contains texts, drawings, calculations, short text. Relation to the Discorsi: elaboration of 2/14-pr-02.

Folio page 72r
Written by Galileo; contains drawings, texts. Relation to the Discorsi: elaboration of 2/14-pr-02.

Folio page 72v
Contains drawings. Relation to the Discorsi: work on 2/34-pr-13.

Folio page 73v
Written by Galileo; contains texts, drawings, tables, calculations. Relation to the Discorsi: work on 2/37-pr-15.

Folio page 74v
Written by Galileo; contains calculations, text, drawing. Relation to the Discorsi: incomplete draft (statement) of 2/34-pr-13.

Folio page 75v
Written by Galileo; contains calculations, short text, table.

Folio page 76r
Written by Galileo; contains texts, drawing, calculations, tables. Relation to the Discorsi: elaboration of 2/15-pr-03; elaboration of 2/16-th-13.

Folio page 76v
Written by Galileo; contains tables, short texts, drawings, calculations. Relation to the Discorsi: work on 2/34-pr-13.

Folio page 77r
Written by Galileo; contains text, drawings, calculations, table. Relation to the Discorsi: work on 2/34-pr-13.

Folio page 77v
Written by Galileo; contains short text, drawings. Relation to the Discorsi: related to 2/34-pr-13.

Folio page 78v
Written by Galileo; contains drawings, short texts, calculations, scratch. Relation to the Discorsi: related to 2/29-th-18; work on 2/37-pr-15.

Folio page 79v
Written by Galileo; contains text, drawings. Relation to the Discorsi: statement and elaboration of 2/23-pr-09-schol1.

Folio page 80v
Written by Galileo; contains calculations, short text, drawings. Relation to the Discorsi: work on theorem of equivalence.

Folio page 81v
Empty page.

Folio page 82v
Written by Galileo; contains short texts, calculations. Relation to the Discorsi: work on theorem of equivalence.

Folio page 83v
Written by Galileo; contains drawing, calculations, short texts. Relation to the Discorsi: work on 3/10-th-07; work on theorem of equivalence; elaboration of 3/04-pr-01.

Folio page 84v
Written by Galileo; contains short texts, drawings, calculations, table.

Folio page 85v
Written by Guiducci; contains text, drawing. Copy without original. Relation to the Discorsi: elaboration of 2/02-th-02; related to 2/00-th-00-dialog2.

Folio page 86r
Written by Galileo; contains text, drawings. Relation to the Discorsi: elaboration of 3/07-th-04.

Folio page 86v
Written by Galileo; contains texts, calculations, drawing, table. Relation to the Discorsi: work on 3/10-th-07; work on theorem of equivalence.

Folio page 86ar
Pasted sheet of paper with corrected drawing. Original drawing without text under the pasted sheet. Relation to the Discorsi: 3/07-th-04.

Folio page 87r
Written by Galileo; contains texts, drawings, tables, calculations. Relation to the Discorsi: draft of 2/27-th-17; statement of 2/37-pr-15.

Folio page 87v
Written by Galileo; contains texts, drawings, calculations. Relation to the Discorsi: statement and elaboration of 3/05-pr-02; work on projectile impetus; draft of 3/05-pr-02-cor.

Folio page 88v
Written by Arrighetti; contains text, drawing. Copied partly from folio 179r; partly a copy without original. Relation to the Discorsi: statement and elaboration of 2/03-th-03; related to 2/00-th-00-dialog2.

Folio page 89av
Written by Galileo; contains drawings, text. Relation to the Discorsi: incomplete draft of 2/09-th-09.

Folio page 89bv
Empty page.

Folio page 90v
Contains short texts, calculations. Relation to the Discorsi: related to pf.