Fred Chester Bond

Fred Chester Bond (June 10, 1899 – January 23, 1977) was an American mining engineer.

[3][4][5] Whereas Rittinger's theory held that the work done in breaking rock is proportional to the new surface area produced (that is, inversely proportional to the diameter of the product particles), and Kick's theory held that the work done is directly proportional to the reduction ratio (ratio of feed particle diameter to product particle diameter), Bond's theory held that the work varies inversely as the square root of the product particle diameters.

Bond's theory and index brought a greater measure of openness to the calculations for selecting the type, size, and power ratings for ore milling equipment.

"[8] Bond's autobiography[9] describes life in Colorado in the 1920s and shows some ways in which it was still somewhat pioneering compared with today.

In addition to his vocation of engineering, Bond had an avocation of thinking and writing on metaphysical subjects.