XXVII. Dissemination of Seeds. 



Make a collection of seeds, and examine carefully. Answer the fol- 

 lowing- questions : 



1. Why do so many seeds have special g-rowths attached to them? 



2. Arrang-e and name the seeds collected according to whether they 

 have 



(t() Barbs or grappling devices. 



(h) Provision for floating on water. 



(c) Provision for floating in the air. 



(d) Mechanism for ejection. 



(e) Juicy parts attractive to animals. 



3. Observe carefully and record the special adaptations to distri- 

 bution possessed by : Witch-hazel, touch-me-not, dandelion, burdock, 

 beg"gar-ticks, blueweed, white pig-weed, cherry, basswood, sedge, pine, 

 milk-weed, maple, poison ivy. 



4. Why are the seeds of most weeds dull colored? 



5. What are the main methods of dissemination of weed seeds? 



6. What birds are largely instrumental in dissemination of seeds? 



[Consult Beal's Seed Dispersal.] 



XXVIII. Domestic Animals. 



1. Compare the dog-, cat, cow, horse, and sheep as to (a) habits of 

 feeding, (b) coverings, (c) shape of limbs, (d) mode of using the limbs, 

 (e) their paws or hoofs, ike, (g) teeth, (h) shape of head. 



2. What animal was probably first domesticated or tamed ? 



3. Study carefully the dog : Kinds — shepherd dog, coach dog, hun- 

 ter, &c. ; as companion or playmate ; care of dogs, intelligence, and 

 fidelity; strong senses of hearing and smelling; character of paws and 

 claws ; what wild animals are related to the dog ? 



4. Study the cat, comparing it with the dog as to intelligence, form, 

 use, manner of walking-, senses, affection, paws, and claws, tongue, bad 

 habits. What wild animals are related to the cat ? 



5. Study the cow : What kind of food does it eat ? How does it 

 eat? What is the "cud"? What are ruminants? Name some 

 ruminants. Of what use are the horns ? What are some of the uses of 

 the living cow? Of the. dead cow? How does the cow lie down? 

 Get up ? 



6. Study the horse: Importance in commerce and war; to civiliza- 

 tion; kinds; intelligence; dentition; kind of food, manner of eating; 

 feet, the way the horse lies down and gets up ; care of horses ; origin ; 

 wild horses. What wild animals are closely related to the horse ? 



