3 BULLETIN 305, U. S. DEPARTMENT OF AGRICULTURE. 
Correlations —Brief written descriptions of the weed and wild 
flower seeds being studied and classified should be made. — 
Drawing: Ample work in drawing is provided in outlining and 
coloring the seeds. 
ANIMALS. 
Review and continued work.—So far as weather conditions permit 
keep up population studies with birds and animals. 
Look for new birds and study them after the outline suggested for 
previous months. 
New work assigned.—The pig is one of the most important sources 
of animal food. A large number of them are butchered during this 
month; hence it is opportune to study this valuable farm animal. 
The following suggestions are given as a guide in making investiga- 
tions: 
(1) How does the pig’s nose differ from that of any other animal? Uses—smell- 
ing, rooting. 
(2) How do hogs fight or defend uleaiilelves” Describe the fighting teeth. 
(3) Do hogs see well? 
(4) What shapes are the heads of hogs—wedge? Dish-faced? Do the ears 
stand out straight or are they lopped? Is the wedge-shaped head an ad- 
vantage to the wild hog? 
(5) Observe the pig’s hair. Is it thick enough to keep off flies? Why do hogs 
wallow in the mud? Are they naturally filthy? Do they attempt to 
clean themselves? When do the hog’s bristles stand up? 
(6) What does the hog like to eat? 
(7) How many toes has the pig—true? False? Of what use are the false toes? 
Can the pig run fast? 
(8) What uses has the pig’ s tail? 
(9) What cries and noises does the pig make that are understood—hunger? 
Satisfaction? Anger? Fear? Others? 
(10) Mention instances to show the hog’s intelligence. 
Practical work.—Practical work is provided in observing hogs and 
the damage done by wild mammals and making records of the facts 
Jearned. Many important facts about hogs may be learned while 
they are being dressed. 
Correlations. —Have members of the class tell short stories orally 
and in writing concerning their observations with hogs. 
Drawing: Make outline drawings of the hog showing wedge- 
shaped heads and dished faces. 
FOURTH GRADE. 
PLANTS. 
Review and continued work.—The pupils of this grade should give 
special attention to the laurel (sometimes called poison ivy) this 
month. It is of considerable economic importance since its leaves 
contain a very active poison. Owing to its being green at a season 
when xost plants are not, stock running in pastures or open woods 
