The study was done in two fields: one was the relation between blood specific gravity and taken quantity of nutrition and taken quantity of each food, the other is the relation between blood conditions and the increasing or decreasing rate of the weight. The results are as follows.
1) When those of normal blood specific gravity are compared with those of low one from the point of nutrition taking, the former turn out to take more nutritious elements more than the latter. There are a meaningful relation between total blood specific gravity and each nutritious elements, calory, protein, iron, carbohydrate, Vitamin A and Vitamin B, there being P less than 0.05.
2) Those of normal blood specific gravity compared with those of low one from the viewpoint of the quantity taking each food, have a tendency to take both animal food and vegetable food much more.
3) There is a close interrelation between total blood specific gravity and blood conditions, haemoglobin, the number of red blood corpuscle and hematocrit, there being P less than 0.001.
4) Studying the relation between the increasing or decreasing rate of the weight of women engaged in agriculture and total blood specific gravity, we can conclude that the fatter they grow the higher the average value of gravity becomes; their average value 1.052 indicates fatness 3 degrees; blood pressure becomes unusual when the fatness degree rises; the great number of people who have normal blood pressure have the normal weight. From the abovementioned, we suggest that it should be necessary to examine the normal value of blood specific gravity of women engaged in agriculture.