452 MARQUIS OF CALIGNY. 



FOREIGN HONORARY MEMBERS. 



THE MARQUIS OF CALIGNY. 



An ancient family, which since 1660 had produced a succession of 

 military engineers, became extinct by the death of the Marquis of 

 Caligny ; several of its members were esteemed by Vauban, and 

 their works are yet well known to civil and military engineers. 



Anatole Francois Hue, Marquis de Caligny, was born at 

 Valognes (Manche), May 31, 1811. The son of Bernard-Henri-Louis 

 Hue, Marquis de Caligny, and Eugenie-Marie-Lconore-Avice de Fer- 

 manville. He was related to many of the illustrious families of 

 France, and popular tradition affirmed that his descent could be traced 

 from Charlemagne ; however this may be, it is certain that he was 

 the last of a distinguished group of hydraulic engineers, among whom 

 may be mentioned Louis Roland de Caligny, founder of the port of 

 Cherbourg. 



De Caligny entered the College of St. L6 in 1822, where he first 

 met Leverrier, who became his intimate friend. This friendship, 

 based on a similarity of tastes, remained constant and unalterable, in 

 spite of the great astronomer's changes of opinion. Caligny remained 

 firmly Legitimist and Catholic, for him the political changes subse- 

 quent to 1789 were as if they did not exist ; with this difference, the 

 two were as brothers. 



At the age of sixteen, he began the study of philosophy at 

 Valognes, in order to be near his family, who resided in the Chateau 

 de Flottemanville, a league from that town. The next year he took 

 up his residence at the Chateau, where he conceived the first ideas 

 of his inventions. 



Following the advice of the Cherbourg engineers, he removed to 

 Paris in 1836. Here he recommenced his experimental investigations, 

 which were to be pursued with little interruption for half a century. 



He soon made the acquaintance of Coriolis, who, appreciating his 

 researches, advised him to embody them in a report to the Insti- 

 tute. In conformity with this suggestion, he prepared a memoir on 

 " Hydraulic Machines with Oscillating Liquid Columns," which was 

 presented to the Academy and referred to a committee consisting 

 of MM. Poncelet,* Coriolis, Gambey, and Seguier, who reported so 



* Poncelet was his predecessor in the American Academy. 



