MANUAL OF NATURE STUDY. 
73 
Compare cost of a loaf of bread with cost of a 
cigar. Compare values to the system. How long 
would it take a cigar smoker to smoke up a horse 
and carriage ? A house and lot ? A suit of clothes? 
Which would you rather have, a good watch or its 
value in cigars ? The teacher should continue such 
questions as long as they seem to have the desired 
effect upon the pupils’ minds. 
Some discussion of tobacco farming may be of in¬ 
terest. Also, the collecting, drying and shipping. 
6. Hints for health, a. Good eyesight, b. Care 
of ears. c. Care of throat, d. Necessity for breath¬ 
ing. e. Care of feet. 
Lessons. 
1. The eye . a. Make drawing on board showing 
coats, iris, humors, pupil, lens, retina, and optic 
nerve, b. Let the pupils make drawing, this time 
copying from the board, c. Study eyelids, lashes, 
and eyebrows as seen about the eyes of other pupils, 
and determine use in each case. Effect if the eye¬ 
lashes were cut away; if the eyebrows were shaved 
off. 
Use of the tears. Effect if the tear glands were 
destroyed and the tears dried up. Effect of dust 
under the eyelids. Give some directions concern¬ 
ing the removal of dust, cinders, etc., when once 
lodged under the eyelids. Effect of exposure to 
