Individual estimates of amount of carbonate and phosphate present. 

 If feasible, weigh a dry bone before and after burning, to get amount of organic and 



mineral matter. 

 Soak a sheep's rib in dilute acid to dissolve the mineral matter and discover the 



properties imparted to the bone by the organic matter alone. 

 Examine the bones of some very young animals, as those of a rabbit. Conclusions 



as to composition. 

 Bones in the body for protection, shape, and use as levers. 



Hygiene of and repair of bones. 

 Shapes, structure and names of a few important bones of the body. 



The nature and use of muscles and tendons. 



The effect and necessity of exercise, hygiene of muscles and principles of training. 

 Nourishment of muscles and bones by blood. Circulation. 



The effects of alcohol and tobacco upon muscles. 

 Location, action and names of a few of the important muscles. 



The windmill, a type of wheel and axle for utilizing the energy of air in motion. 



The water-wheel in the same way for utilizing the energy of running water. 

 Practical study of magnetism and frictional electricity. lightning and the protection 



of buildings by rods. 

 The simple action of electric bells, telegraph instruments, dynamos and electric 



motors. Application. 



Visit to the power plant or electric light works. 

 Simple action of a toy steam engine and application to stationary engines, 



locomotives and boats. 



The necessity for transportation of raw materials and manufactured products. 

 The great railroad lines and steamboat routes of the world. 

 How goods are shipped and how people travel. 

 Stories of great inventors. 



SUGGESTIONS TO THE SIXTH GRADE TEACHER. 



The purpose of the work above alluded to is to introduce the child to the present highly 

 complex environment in which he is living, and of which he is to become a part. His interest 

 in the lower stages of culture having been, in part, gratified, he will take kindly to this work 

 if it is made practical and brought within his comprehension. The mussels for the early fall 

 work may be procured from the ponds and lakes of the neighborhood. Although present in 

 most of the streams, they are not so easily found. They may be shipped some distance in a 

 canvas bag and are very easily kept. Those that die in the tank should be removed in order 

 to avoid polluting the water for the others. When the studies are completed the live ones 

 should be returned to some favorable place. Irregular pearls are not uncommon, either 

 attached to the inside of the valves, or embedded in the body just beneath the beaks. Oyster 

 shells may be procured from the dealers. The weak acid referred to in the outlines is pre- 

 pared by taking one part of commercial hydrochloric acid and adding four parts of water. 

 Although not strongly corrosive when thus diluted, it should not be gotten upon the clothes 

 or fingers. It is promptly neutralized with ammonia. Limestone charged with shells and 

 corals may usually be found in the fields and gravel banks. The various rocks and minerals 

 called for in the outlines may be purchased from Ward's Natural Science Establishment, 

 Rochester, N. Y. They are not expensive, and may be used over and over and passed from 

 one grade to another. The state geological reports may be consulted for the distribution of 

 economic rocks and minerals. The Mineral Resources of the United States, obtained gratui- 

 tously from the U. S. Geological Survey, Washington, D. C., gives much information con- 

 cerning the distribution and output of this class of materials. 



The manufacture of glass may be very simply illustrated in the school-room by fastening 

 (by melting) a short piece of fine wire in a small glass tube. Turn the end of the wire into a 

 loop, heat in an alcohol lamp or bunsen burner, and dip into dry soda. Melt that which 

 adheres into a small clear bead, and while hot touch it to a quartz sand grain. Reheat and 



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