Sincerely, Ballister-ffoulkes

21 November 1666 Cambridge

My dear Isaac,

Your paper has arrived. I haven't had time to look it over yet, but I shall find time to peruse it during the forthcoming holidays. I am, of course, very interested in what problems concerned you during the summer.

A very merry Christmas to you, my boy.

Is. Barrow

22 November 1666

FROM: Ballistics Research Dept., British Army Artillery

TO: Isaac Newton, A.B., Woolsthorpe

SUBJECT: Ballistics research data.

ENCLOSURE: Range table sample for 9-lb. artillery.

2nd ENCLOSURE: Outline and general discussion of ballistics

1. In order to better understand the problems facing this Department, you will familiarise yourself with the enclosed material.

2. This material is confidential, and is not to be allowed to fall into unauthorised hands.

By order of the Commanding General

SECOND ENCLOSURE

The purpose of this project is to determine, with as great a degree of precision as possible, the range of artillery used by His Majesty's Armed Forces, and the methods of accurately firing upon targets at various distances from the cannon.

After a great deal of research, the following factors have been found to affect the distance which a cannon ball may be hurled by exploding gunpowder:

1. Weight of the cannon ball.

2. Weight of powder used.

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