William H. Bowker

1850 – 1916

• A tribute to Levi Stockbridge, professor of agriculture in the Massachusetts Agricultural College from 1871 to 1882 and President of the College from 1880 to 1882
• A tribute to Levi Stockbridge, professor of agriculture in the Massachusetts agricultural college from 1871 to 1882, and president of the college from 1880 to 1882
• Levi Stockbridge and the Stockbridge principle of plant feeding
• Plant food
• The old guard
• The old guard
• The problem of fertility in the middle west
• The relation of the fertilizer industry to the agricultural and industrial development of the country