IN his far-reaching essay on “Education,” Mr. Herbert Spencer remarks: “In education the process of self-development should be encouraged to the uttermost. Children should be led to make their own ...

Certain plants produce some flowers with only male parts (staminate flowers) and some flowers with only female parts (pistillate flowers). Cucumbers and squash, pictured here, are a good example. The ...

DR. ASA GRAY’S Botanical Series, New York, Ivison & Phinney, consisting of— I. How Plants Grow, etc., with a Popular Flora, etc. 16mo. pp. 233. II. First Lessons ...