Antonii a Leeuwenhoek ... Epistolae physiologicae super compluribus naturae arcanis

LETTER XXV. Page 219

A grain of barley original: "Hordeolum" dissected, etc. The plantlet, or the first rudiments of the plantlet, found therein. The rudiments or primordia of the stalks also cut through the middle. Pores perceived in the plantlet: and even valves, destined both for carrying up and for stopping the juices. Those plantlets are covered with flour and clothed with grass. In barley and wheat, not only the plantlet but also the primordia of the fruits were found. Various observations concerning young barley plants. Flour, included in grains of barley, wheat, and others, supplies nourishment to the plant. Concerning the tubules of the plantlets. Those tubules are equipped with valves. The position and arrangement of the valves. The juices propelled upwards, remain upwards. Putrefaction is the generator of neither plants nor animals. Seeds of Chinese oranges original: "Malorum Chinensium" dissected with skill, etc.

LETTER XXVI. Page 230

Flour included in wheat, barley, etc., is described. That flour does not have a globular roundness. By what method those small flours grow. The admirable transparency of the flour globules. Various experiments concerning those globules. They are likely covered with a thin skin. For what purpose a flexure or commissure has been naturally generated in wheat grains. The flour particles themselves also curve into such a flexure. A flour particle, not exceeding a grain of sand in size, consists of countless parts. Other observations concerning that flour: likewise concerning bean flour. Concerning pea flour. Bean flour, having been moistened, heated, etc., departed into various shapes. Concerning rice flour. Also concerning buckwheat flour, which is restrained by no membrane. The excrement of various animals examined. Concerning coffee flour and Turkish wheat or maize.