Navy (contagious diseases). Return showing the number of cases of venereal diseases in Her Majesty's ships and vessels stationed at five home ports, at which the contagious diseases acts have been and are in operation, and the number of cases in Her Majesty's ships and vessels at five home ports at which the contagious diseases acts have never been applied, from the year 1860 to the year 1875, inclusive; together with the ratios per thousand of force for each year at each port, and the total ratios for the ports under the acts, and the ports not under the acts [electronic resource].