Diagrams concerning the air's resistance to bodies moved in it
                                Date
                            
                            
                                17 January 1687
                            
                            
                        
                            
                            
                            
                                Creator
                            
                            
                                Unknown, Artist
                            
                            
                        
                            
                            
                            
                                Object type
                            
                            
                            
                        
                            
                            
                            
                                Manuscript page number
                            
                            
                                p51
                            
                            
                        
                            
                            
                            
                                Material
                            
                            
                            
                        
                            
                            
                            
                                Dimensions
                            
                            
                                height (page): 370mm
width (page): 235mm
                            
                        
                            
                            
                            width (page): 235mm
                                Subject
                            
                            
                            
                        
                            
                            
                            
                                Description
                            
                            
                                Two diagrams in a copy of a letter from John Wallis to Edmond Halley dated 17 January 1687 at Oxford.
Read at the meeting on 26 January 1687.
                            
                            
                        
                            
                            
                            Read at the meeting on 26 January 1687.
                                Transcription
                            
                            
                                Hence ariseth (in the transverse lines) for the first movement 1, for the second 1 + 1, for the third 1 + 1+ 1, and so forth, in Arithmetical progression: As are the Ordinates in a Triangle, at equal distance.
And such are the continual increments of the Diameter or of the Ordinates in the exterior Parabola, answering to the interior ordinates, or segments of the Tangent equally increasing. As is known, and commonly admitted.
Transcribed by the Making Visible project
                            
                        
                            
                            
                            And such are the continual increments of the Diameter or of the Ordinates in the exterior Parabola, answering to the interior ordinates, or segments of the Tangent equally increasing. As is known, and commonly admitted.
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.
                            
                        
                            
                            
                            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.
                                Related fellows
                            
                            
                            
                        
                            
                            
                            
                                Associated place