Diagram to assess the air's resistance to projectiles
Date
4 March 1687
Creator
Unknown, Artist
Object type
Manuscript page number
p53
Material
Dimensions
height (page): 370mm
width (page): 235mm
width (page): 235mm
Subject
Description
John Wallis's study of the air's resistance to projectiles was initially presented to the Royal Society at its meeting on 26 January 1687, and printed in Philosophical Transactions vol. 16, no. 186 (1687). Wallis elaborated further on his thoughts in a letter to Edmond Halley, which was read to the Society on
9 March 1687. This diagram belongs to this letter.
9 March 1687. This diagram belongs to this letter.
Transcription
If to this of Gravity, be joined a projecting Force; which is to the Impulse of Gravity as hk to hf (be it greater, less or equal) taken in the same line: the same Parallels determine proportional Parallelograms, who's aggregate is KQ.
Transcribed by the Making Visible project
Transcribed by the Making Visible project
Object history
At the meeting of the Royal Society on 26 January 1687, ‘A letter of Dr. Wallis was read, concerning the resistance of the medium to bodies projected through it, as likewise to the fall of bodies: and it was ordered to be printed in one of the next Philosophical Transactions’ (Birch 4:521). Printed in J. Wallis, ‘Concerning the measure of the airs resistance to bodies moved in it’, Phil. Trans. vol. 16, no. 186 (January, February and March, 1687), 269-80.
At the meeting of the Royal Society on 9 March 1687, ‘A letter of Dr. Wallis to Mr. Halley, dated at Oxford March 4, 1686/7 was read, containing a farther illustration of his calculus of the opposition of the air to project[ile]s; together with some reflexions on Mr. Hooke’s hypothesis of the mutability of the poles of the earth’ (Birch 4:528).
At the meeting of the Royal Society on 9 March 1687, ‘A letter of Dr. Wallis to Mr. Halley, dated at Oxford March 4, 1686/7 was read, containing a farther illustration of his calculus of the opposition of the air to project[ile]s; together with some reflexions on Mr. Hooke’s hypothesis of the mutability of the poles of the earth’ (Birch 4:528).
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Associated place