Author:
Ernest de Jonquières (1820-1901), French naval officer and mathematician [Léon Lalanne [Léon Louis Chrétien Lalanne] (1811-1892), French engineer and mathematician]
Written on both sides of the card, dimensions 5.5 x 9 cm. Good, with a little light scuffing on the front. Communication between two leading lights of French nineteenth-century mathematics. Printed text reads 'VICE-AMIRAL DE JONQUIERES | MEMBRE DE L'INSTITUT | AVENUE BUGEAUD, 2'. Asks Lalanne to 'inscrire Monsieur Bonnaffé, lauréat de l'Institut, parmi les lecteurs'.
