[Teachers differ much in their plans of conducting recitations. Some are very minute in their questions; while others go to the other extreme, and merely name the topics, the pupils being expected to give in full what is said upon them. Neither of these plans should be adopted exclusively, but the mode of recitation should be much varied from time to time. This variety is somewhat aimed at in the questions which I have prepared, though in no case are the questions as minute as they should occasionally be made by the teacher. The numbers refer to the pages. It would be well to have the pupils draw many of the figures upon the blackboard, and then recite from them. By drawing the simplest figures first sufficient skill may be acquired to enable the pupil to draw those which are quite difficult.] CHAPTER I. 13. What is said of the distinction between matter and spirit? What of Bishop Berkeley's ideas? What of Hume's? 14. What is the origin of the word spirit? What is the relation of the senses to the spirit? What is said of the effects of matter on the senses? What are the forms of matter? 15. Illustrate the difference between elastic and non-elastic fluids. What is said of the union of the particles of a solid? Give the difference noted between different solids. How does a liquid differ from a solid? Give particularly what is said of water. 16. What is said of the particles of gaseous substances? What of the atmosphere? What of the vapor in it? What is said of the entering of liquids and gases into interstices? What of the mingling of gases with liquids? Give the illustration in regard to fishes. 17. What is said of the solution of solids in liquids? What of the evaporation of water in the air? Illustrate the influence of heat on the forms of matter. What is said of the thermometer? What of mercury, water, and iron in relation to the liquid state? What is said of our knowledge of matter? 18. What was the supposition of Newton about the composition of matter? What is said of the changes of matter? What are the imponderable agents, and why are they so called? CHAPTER II. 19. What is said of variety in the properties of matter? What of the divisibility of matter? 20. What is said of gold-leaf, and of the wire of gold-lace? What of the soap-bubble? What of the thread of the silk-worm, and of the web of the spider? What of solution of blue vitriol? What of odors? 21. What is said of the dust of the puff-ball? What of pollen? What of the dust rubbed from a moth's wing? What of guano? What of the glazing of visiting-cards? What of the minuteness of some animals? 22. What is said of the Deity in relation to minute animals? What is said of substances called porous? What of those in which there are no pores apparent? What proof is there that all substances have spaces in them?