230 NATURE STUDY REVIEW [7 :8— Nov., 1911 



number of dogs on the street together? Do cats run about in 

 packs? If one dog starts to chase a cow, what do other dogs 

 that are near by, do? The wolves and jackals, wild progenitors 

 of the dogs run in packs. Thus these animals not sufficiently 

 strong individually, to resist their foes or pull clown their prey, 

 associate in packs or herds and so accomplish the desired end. 

 Read chapter seventeen of Du Chaillu's Land of the Long Night. 

 Which of the common domestic animals go in herds ? Their wild 

 relations do the same. Wolves will readily kill a single cow, but 

 when the herd stands together with lowered heads the circle of 

 horns effectually resists the attack. 



Besides the stories already mentioned the following are sug- 

 gested : Mother 's Wolf Story, St. Nicholas, March 1903. Lion 

 and Tiger Stories, Republished from St. Nicholas, published in 

 book form by the Century Co. Porter's Wild Beasts 



Lesson XIII. Structure of the Leg. — Bring out by appro- 

 priate questions the fact that all these animals have head, trunk, 

 tail and limbs. Do angle worms have these parts ? Can you think 

 of other animals that do not have them? Of some that do? 

 Have the cat in the school room and let the children note the 

 parts of the leg — the upper leg, lower leg, foot, toes. Does the 

 cat have joints like we do? Notice the parts of your own arm — 

 upper arm, forearm, hand and fingers? Does the dog have joints 

 in its legs ? How many are there in its foreleg ? Are they similar 

 to those of the cat's foreleg in number and position? Are they 

 similar to your own joints at knuckles, wrist and elbow? Com- 

 pare the foreleg of the squirrel and rabbit. How many joints 

 are there? Are they similar in position to those of the dog and 

 cat? Make an outline sketch of a person's arm and then of the 

 foreleg of each of these animals to show the number of joints 

 and the parts between joints. Then reduce these sketches to 

 straight line diagrams in which the joints are represented by 

 spaces and the structures between the joints by lines. Your own 

 arm would be diagrammatically represented thus : 



The wise teacher will correlate the drawing and the nature 

 study at every opportunity. It is an imoprtant correlation — one 

 that is beneficial to both subjects. To draw well one must see 

 well. The observation training is a decided aid to the art in- 

 struction. And to insist upon the execution of a drawing is to 

 insure some careful observations. The average pupil who ex- 

 claims in disgust, "I cannot draw !" would make a more truthful 

 confession were he to say "I cannot see." 



