﻿142 The Philippine Journal of Science m* 



19. The more important equivalents of the plane figures. 



20. Polyhedron, intersections, dihedral and polyhedral angles. Regular 

 and irregular polyhedrons. 



21. How many and what are round bodies? How are they originated? 



22. Volume of geometrical body and unit of volume. 



23. Way of finding the volume of a pyramid, of a prism, and of a 

 rectangular parallelogram. 



24. How is the volume of the regular polyhedron, of the cylinder, and of 

 the sphere found? 



25. Relation between two spheres of different radii. 



NATURAL SCIENCE 



1. Natural science and its division into physics, chemistry, and natural 

 history. 



2. General properties of bodies. 



3. Three states in which bodies can be found. 



4. Movement and its different classes. 



5. Anemometers and their use. 



6. The barometer, its use, and the principle on which it is based. 



7. The thermometer, its use, and the principle on which graduation is 

 based. 



8. Instruments for measuring humidity, on what are they based, and 

 what are their uses? How is the electromotive force valued? How is it 

 named when it is of high pressure? 



9. Light, how it is propagated, its velocity, and time required to pass 

 from the sun to us. 



10. Reflection of the luminous rays, angles they form on falling on a 

 polished body. Refraction of the same. 



11. Microscope, eyeglass, and telescope. 



12. Lenses and especial property of the convex, of the concave. Who 

 uses the former? Who uses the latter? 



13. Colors that a ray of the sun is composed of and how to decompose it. 



14. Electricity. Its properties. How is it developed? Different ways of 

 developing it. 



15. The magnets, the compass, and the electromagnet and their important 

 applications. 



16. Simple and compound bodies. Metals and metaloids, properties of 

 the former and the latter. 



17. Oxygen, hydrogen, and nitrogen and their principal properties. 



18. Pure water and of what it is composed. The atmospheric fluid and 

 of what it is formed. 



19. Minerals. How do they appear and into how many groups can they 

 be divided? 



20. Vegetables. How do they appear, and of what are they composed? 

 Divisions. 



21. Organs of nutrition and of reproduction of vegetables. 



22. Functions of nutrition and functions of reproduction in the vegetable 

 kingdom. 



23. Animals. How do they appear and of what are they composed? 



24. Nutritive functions for the preservation of the animal. 



25. Four great groups into which they are divided. Subdivisions of each 

 of them. 









