Our ignorance of many physical and psychical laws and of innumerable conditions of fact, will prevent us from obtaining a precise view of this level of criminality. But none the less is it the necessary and inevitable result of a given physical and social environment. Statistics show us, indeed, that the variations of this environment are always attended by consequential and proportional variations of crime. In France, for instance (and the observation will be found to apply to every country which possesses an extended series of criminal statistics), the number of crimes against the person varies but little in sixty-two years. The same thing holds good for England and Belgium, because their special environment is also less variable, <p 77>by reason that hereditary dispositions and human passions cannot vary profoundly or frequently, except under the influence of exceptional disturbances of the weather, or of social conditions. In fact, the more serious variations in respect of crimes against the person in France have taken place either during political revolutions, or in years of excessive heat, or of exceptional abundance of meat, grain, and wine. This is illustrated by the exceptional increase of crime from 1849 to 1852. Minor offences against the person, on the contrary, which are more occasional, assaults and wounding, for example, vary in the main, as to their annual oscillations, with the abundance of the wine harvest, whilst in their oscillations from month to month they display a characteristic increase during the vintage periods, from June to December, notwithstanding the constant diminution of other offences and crimes against the person. On the other hand, crimes against property, and still more offences against property, show wide oscillations on account of the variability of the special environment, which is almost always in a condition of unstable equilibrium, as in periods of scarcity, and of commercial, financial and industrial crises, and so forth, whilst they are subject also to the influence of the physical environment. Crimes and offences against property display extraordinary increases in the severest winter seasons, and diminutions in milder winters.