In Swedish Lapland 18 years, 0 months, 0 days. In Christiania 16 years, 9 months, 25 days. In Copenhagen 16 years, 9 months, 12 days. In Munich 16 years, 5 months, 12 days. In Göttingen 16 years, 2 months, 2 days. In Vienna 15 years, 8 months, 15 days. In Berlin 15 years, 7 months, 6 days. In Stockholm 15 years, 6 months, 22 days. In Manchester 15 years, 6 months, 0 days. In Warsaw 15 years, 1 month, 23 days. In London, between 15 years, 1 month, 4 days. and 14 years, 9 months, 9 days. In Paris, between 15 years, 7 months, 18 days. and 14 years, 5 months, 17 days. In Madeira 14 years, 3 months, 0 days. In Montpellier 14 years, 2 months, 0 days. In Corfu 14 years, 0 months, 0 days. In Marseilles 13 years, 11 months, 11 days. In Calcutta 12 years, 6 months, 0 days. In Egypt 10 years, 0 months, 0 days. The collective results of the investigations of French authors regarding the average age at which menstruation first appears are given in the following table: I. IN TEMPERATE CLIMATES: _Observer._ _Place._ _No. of _Average Age._ Cases._ De Soye Paris 1,000 15 years, 0 months. Dubois Paris 600 15 years, 3 months. Raciborski Paris 200 14 years, 5 months. M. Despines Paris 85 14 years, 11 months. Arau Paris 100 15 years, 4 months. Courty Montpellier 600 14 years, 3 months. Puech Nîmes 941 14 years, 2 months. M. Despines Toulon 43 14 years, 1 month. M. Despines Marseilles 25 14 years, 1 month. Puech Toulon 144 14 years, 1 month. Grey London 1,498 15 years, 6 months. Lee & Murphy London 1,719 15 years, 6 month Torisiano Corfu 33 14 years, 6 months. Lebrun Warsaw 100 15 years, 1 month. from these observations we obtain an average of 15 years. II. IN COLD CLIMATES: _Observer._ _Place._ _No. of _Average Age._ Cases._