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The anatomy of plants

Chapter 118: Lecture on Mixture
By Nehemiah Grew
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About This Book

This work presents a systematic, observational study of plant structure and function, describing the internal organization of seeds, roots, stems, leaves, flowers, fruits, and seeds as revealed by close inspection and a microscope. It maps tissues and organs, explains the movement of sap and air, and analyses the generation and distribution of plant fluids and substances such as milks, oils, and salts. Additional lectures examine leaf and flower anatomy, coloration, tastes, and soluble salts, and the text includes comparative tables and explanatory notes to support a mechanical and physiological account of vegetation.

A
DISCOURSE
Read before the
ROYAL SOCIETY
Decemb. 10. 1674.
Concerning the
NATURE, CAUSES, and POWER
OF
MIXTURE.

AVING the honour to perform the Task of this day; I shall endeavour to conform to the Phylosophy, which this Society doth profess; which is, Reasoning grounded upon Experiment, and the Common Notions of Sense. The former being, without the latter, too subtle and intangible; the latter without the former, too gross and unmanageable: but both together, bearing a true analogy to our selves; who are neither Angels, nor meer Animals, but Men.

The Subject I have chosen to speak of, is Mixture. Whereof, that our Discourse may be the more consistent, and the better intelligible; all I have to say, shall be ranged into this Method; viz.

1. First, I shall give a brief account of the received Doctrine of Mixture.

2. Next, lay down some Propositions of the Principles whereof all Mixed Bodies consist.

3. Then, open the true Nature of Mixture; or say, What it is.

4. And then enumerate the Causes of Mixture; or say, How it is made.

5. Lastly, I shall shew the Power of Mixture; or, What it can do.