MANUAL OP NATURE STUDY. 
103 
Question: When the solvent juices of the stom¬ 
ach are acting upon the solid food just swallowed, 
what would be the effect of a large drink of water, 
or any other drink ? These solvent juices act best 
when the temperature of the stomach is about as 
warm as blood. Then what effect would a glass of 
ice water or a dish of ice cream have upon digestion 
if taken just after or during a meal? 
Review the organs of digestion together with the 
function of each, and develop some hygienic laws 
relative to best digestion and consequent good 
health. A lesson or two on the effect of alcohol 
upon the stomach and its juices, would be alto¬ 
gether proper with this subject of digestion. 
A general discussion of “stomach troubles” such 
as dyspepsia, may be deferred to the eighth grade. 
3. Circulation . a . Organs of. b. Functions of 
each organ, c . Favorable and unfavorable condi¬ 
tions. 
We stated a while ago that the dissolved food 
passed through the thoracic duct to veins, thence 
to the heart, and from that organ to the general 
circulation. Just at this point a good beef heart 
from a slaughter house should be provided and 
the teacher should proceed to dissect the same in 
the presence of the pupils, showing the right and 
left auricles, right and left ventricles, valves, 
