306 Royal Academy o/Scioices of Paris. 



Le Pelletier de Saint-Fargeau, relating to hybrid productions. — M. 

 Beudant made a favourable report on the memoir of MM. Delcros 

 and Rozet, on the nature of the soils which compose the mountains 

 of the south part of the marshes of Caronte and Bene, department 

 des Bouches-du-Rhone. This memoir particularly describes some 

 deposits of lignite of a prior formation to those which have hitherto 

 been noticed. — M. Moreau de Jonnes communicated some statistical 

 sketches On the civil life and domestic ceconomy of the Romans at 

 the commencement of the fourth century of the Empire. — M. Rozet 

 read a geological notice on the environs of Aix in Provence. — The 

 experimentsof M. Giroux de Buzareingues, on the reproduction of 

 domestic animals, were read. 



April 9. — The Minister of the King's Household transmitted a 

 memoir by M. Ratienville On several oeconomical methods of giving 

 woollens a deep blue colour without using indigo. — M. Bernay ad- 

 dressed to the Academy anew solution of the problem of longitudes ; 



MM. Griffon (father and son), a design for a new machine; — M. 



Losana, a collection of meteorological observations made at Lorn, 

 briasco. — M. Gay-Lussac presented an instrument proposed by M, 

 Collardeau, which indicates the number of atmospheres and portions of 

 an atmosphere which correspond to the elastic force of vapour in 

 steam-engines. — M.Sturm read a memoir On the application of the 

 calculus to determine the course of reflected or refracted rays. — 

 M. Damoiseau read a memoir On the perturbations of the comet 

 of 6^ years. — The Academy, by the confirming opinion of the Sec- 

 tion of Geometry, decided that there is no occasion for proceeding 

 to supply the place of M. Laplace at present.— M. Geoffroy Saint- 

 Hilaire read a memoir upon a monstrous junction of the membranes 

 and the yolk, and the effects which the adhesions produced in a 

 newly hatched chicken. 



April 16. — M. Cazenave requested to deposit a sealed packet 

 containing a description of a new method of breaking a stone in the 

 bladder. — M. Banque sent some observations on the employment of 

 the ethereal tincture of the powdered leaves of the Belladonna, in 

 a case of spontaneous hydrophobia and a violent colic. — M.Serullas 

 sent a letter to fix the date on the subject of some new observa- 

 tions which he had just made on the cyanurets. — M. Desgenettes 

 became a candidate for the vacant place of Academician. — M. Geof- 

 froy Saint-Hilaire announced, that it results from the recent obser- 

 vations of Dr. Barry, that the air is more compressed in the egg 

 than in the atmosphere. — M. Cauchy read a memoir On the integra- 

 tion of linear equations with partial diffi^rences. M. Becquerel read 

 a memoir On the electricity developed during chemical action, and 

 upon the employment of very weak electrical currents as a mean of 

 exciting the combination of a great number of bodies. — M. Richard 

 read the Monographie des Orchidces. — M. Boullay read a memoir 

 On double iodides. The Commission named by scrutiny, for pre- 

 senting candidates for the vacant situation of free Academician, is 

 composed of MM. Le Gendre, Fourier, Desfontaines, Thenard, 

 Andreossy, and Maurice. 



April 23. — M. Darnaud writes, that in a part of Greece which he 



has 



