Finally, the author considers the influence of emigration. It is chiefly the crimes against property that feel the favorable effects of it, as murder does among crimes against persons. The cause of this favorable influence is easily explained. Emigration removes a number of persons who, not having the means of existence, would easily become criminals. The consequences of agricultural vicissitudes are as follows: the years of abundant harvests show a decrease in criminality, bad years, on the contrary, an increase; good vintages, however, lead to the same result. It is chiefly crimes against property (especially rural thefts) that yield to the influence of the degree of the abundance of the harvest; while among crimes against persons it is principally assaults that show the effect of the character of the crops. It is plain that the agricultural class is that which especially shows the effect of a bad harvest. During the years 1887–1889 the proportion of the farming class among those convicted rose from 35.3% to 37.8% and 38.2%. The effect of the fluctuation of the price of food is the following: criminality in general shows the influence of it greatly. When prices fall crime diminishes, and vice versa. This is more clearly to be seen in crimes against property. Crimes against persons increase especially when the price of wine is low, and vice versa. When a fall in the price of food coincides with a fall in the price of wine, the increase of crimes against persons is great. According to Dr. Fornasari di Verce the cause of the increase of crimes against persons in the case of low food prices is not to be found in the improved nutrition that results, but in the greater consumption of alcohol. The other crimes feel the effect of the fluctuations in the price of provisions less. The author then takes up manufacturing. (As a consequence of the defectiveness of the official statistics the data are incomplete.) During the period of which the author speaks, manufacturing increased enormously, and crime in general increased also. The serious forms, however, decreased while the less serious ones increased. Industrial crises bring an increase chiefly of crimes against persons. The condition of the working-people. According to the author it would be of the highest importance to establish for each year the number of industrial workers. For this has a greater importance for criminality than the price of food or the rate of wages. In default of official data such an investigation cannot take place, and he has to limit himself to an examination of wages. With some few exceptions these wages increased about 35% during the period 1873–1889. However, to obtain a clearer picture of the condition of the working-class, the author has combined the fluctuation of wages with those of the price of grain; that is, he has made a calculation of the number of hours each man has had to work to get 100 kilograms of grain.