388 Scientific Intelligtnce, — Geography. 



ing region, whence it was immediately derived ; and that, im- 

 mediately after the discovery of America, it spread rapidly in 

 the Old World, and soon became common, a fact not reconcile- 

 able with the idea of its former existence there. To these 

 proofs Aug. de Saint Hilaire has added another. He has re- 

 ceived from M. de Larranhaga of Monte Video, a new variety 

 of maize, distinguished by the name of Tunicata ; because^ in^ 

 stead of having the grains naked, they are entirely covered by? 

 the glumes. This variety is from Paraguay, where it is culti- 

 vated by the Guaycurus Indians, a people in the lowest scale 

 of civilization, and where, according to the direct testimony of 

 one of them, it grows in the humid forests as a native produc- 

 tion. 



GEOGRAPHY. 



23. Tables for Converting French Toises and Metres into 

 English Feet, and the contrary. — Readers of philosophical 

 works and foreign journals frequently meet with dimensions 

 expressed in French measures. To enable such to convert 

 them readily into English measures^ the following Tables have 

 been computed. The lengths of a Toise and a Metre in English 

 measure, which are the foundation of the Tables, have been ta- 

 ken from Baily's Astronomical Tables and Formulce, and he 

 deduced them from their lengths, as given in the Base du Sys- 

 time Metrique, vol. iii. and Captain Kater's paper on the Length 

 of the French Metre in the Phil. Trans, for 1818. 



TABLE I. 



1 French Toise =* 1.949036 French Metres = 6.394950 English Feet. 

 1 French Metre = .513074 Toise = 3.280899 English Feet. 



1 English Foot = .156373 Toise = .304794 French Metre. 



TABLE II. FOR CONVERTING FRENCH TOISES INTO ENGLISH FEET. 



