The original punctuation and ortography of the book have been faithfully preserved; words which are spelled variantly, or inconsistently capitalized (e.g., Axel vs. Axle, crowded vs. crouded, blue, red vs. Blue, Red, etc.) have been left as such.

Likewise, the (mis)spelling of names like GalilÆo, Azout, Hugen, Guerick, has been retained.

The following typographical mistakes have been corrected, taking into account recurrences across the text:

• Page III, 25th day:
  • The Ebullition of Liquors in Vacuo ? The Ebullition of Liquors in Vacuo
• Mechanicks, Explication of the 2nd Plate:
  • Figure. 1. Is the deceitful Balance; which yet is in Equilibrio ? Figure 1. Is the deceitful Balance; which yet is in Æquilibrio
  • Fig.3 ? Fig.3.
  • [Fig. 10]: perpendiculary ? perpendicularly
  • [between Fig. 9 and 10]: N. B. ? N. B.
  • [Fig. 10]: and in this Leaver ? and in this Lever
• Mechanicks, Expl. 5th Plate, Fig. 3:
  • us it is less restrained. ? as it is less restrained.
• Opticks, Expl. 1st Plate, Fig. 3:
  • Looking-glass ? Looking-Glass
• Opticks, Expl. 2nd Plate:
  • Fig.8. Shows ? Fig.8. Shews
  • [Fig. 10]: on the like Acccount. ? on the like Account.
• Hydrostaticks, Expl. 1st Plate:
  • [Fig. 5]: specifick Gravity of Water ? Specifick Gravity of Water
• Hydrostaticks, Table of Specifick Gravities:
  • Spirit of Nirre ? Spirit of Nitre
• Pneumaticks, Expl. 2nd Plate:
  • [Fig. 1]: 'tis by this Thteefold ? 'tis by this Threefold
  • [Fig. 2]: small Part of ccmmon Air ? small Part of common Air
• Pneumaticks, Expl. 5th Plate:
  • [Fig. 6]: as between the Hemispheres ? as between the Hemispheres.
• Pneumaticks, Expl. 6th Plate:
  • [Fig. 6]: througn Muslin ? through Muslin