g6 Lessons in Nature Study. 



cow, be sure they notice that in lieu of front teeth the cow 

 has a bone (pre-maxillary) not found in man. 



Show the interior of the skull. Here the ethmoid and 

 sphenoid bones are exhibited clearly, and the office of each 

 is plainly indicated. 



The delicate turbinal bone rolled up in its narrow cham- 

 ber and the long knifelike vomer are easily found and form 

 most interesting objects. Procure enamel paints and paint 

 each bone a different color, so that the shapes and outlines 

 of the bones and the interlacing of sutures are brought out 

 into sharp contrast. After the paint is dry label each bone 

 and mount the skull on a board. 



This will form a useful object for future lessons, a neces- 

 ary piece of apparatus made by pupils while learning the 

 subject. Of the bones not found in human skulls nothing 

 need be said. The pupils of the Chatham School prepared 

 the skulls of the cow, pig, dog, and sheep one year. 



An Incident. Last fall I learned that a goat had been 

 buried in the vicinity three years before. Knowing that 

 nature had by this time done much toward cleaning the 

 bones, I said to my physiology class that I would be ready 

 to go with the boys any Saturday morning to dig up the 

 goat and prepare his skeleton. On the following Saturday 

 five boys reported at my house, and we set out for the grave 

 of his goatship. We dug " BiHy " up, and having placed 

 his bones in a bag, we bore him home in triumph. 



After boiling the bones in sal-soda and then soaking over- 

 night in bleaching-powder, we rinsed them in clear water 

 and laid them in the sun to dry. The next day was spent 

 in arranging the bones. One day each week we spent a 

 half hour in boring and fitting, until at last Billy's bones 

 were in position. His skeleton now adorns the school- 

 room. Can any one question the educational value of such 

 work? 



(Notice that only those who wanted to go to the digging 

 up went, so, that the most objectionable feature was not 

 forced upon anybody.) 



