456 Scientific Intelligence. [Dec. 



the subject of Wronski's mathematical works ; for I am anxious 

 to know in what estimation he is held by our mathematicians. 



I see from the newspapers that the Royal Academy of Sciences 

 in Lisbon has noticed him. It is stated that, at the sitting of 

 June 24, " M. Ve de Conto read an introduction to a memoir 

 which had gained a prize relative to the programma of the 

 academy upon the demonstration of rules given by Wronski for 

 the general reduction of equations." 



The works mentioned below are those I am acquainted with : 

 whether he has published any more I do not know. I am, Sec. 



An Amateur. 



Introduction a. la Philosophie des Mathematiques et Technie 

 de 1' Algorithmic Par Ho'ene Wronski, ci-devant Officier Su- 

 perieur d'Artillerie au Service de Russie. A Paris, chez Cour- 

 cier, 1811. 



Refutation de la Theorie des Fonctions analytiques de 

 La Grange. Par Hoene Wronski. A Paris, chez Blankenstein, 

 1812. 



Philosophie de Flnfini, contenant des Contrereflexions et 

 des Reflexions sur la Metaphysique du calcul infinitesimal. Par 

 Ho'ene Wronski. A Paris, 1814. 



Philosophie de la Technie, Seconde Section, contenant les 

 Lois des Series comme Preparation a la Reforme des Mathema- 

 f iques. A Paris, 1817. 



VIII. Table for computing Heights by the Barometer, 

 By Dr. Tiarks. 



(To Dr. Thomson.) 

 SIR, Montreal. 



I hope that the following table for computing heights from 

 barometrical observations will not be unacceptable to many of 

 the readers of your journal. 



It is founded on the following formula of La Place : 



Height in metres m 18393 (1 + ^_p) log. \ (1 +^= T f) 



b, expressing the height of the barometer. 



t 9, the temperature of the air and the barometer, or the 

 degrees of the detached and attached thermometers, according 

 to the centigrade scale at the lower station. 



b' ', t' ', $', the same at the upper station. 



'This formula, supposing the metre to be 39*371 English 

 inches, and expressing the temperature according to Fahren- 

 heit's scale, will be as follows : 



tt.h4.--c r \ c 4- 61S1 * 3(mi x S36 n + t \ 



Height in English feet = -— ( 1 + ^h (— ) 



, b , 5 (5 — ?') _ r 6131 x 3"371 x 836 , _^ , ft + t'\-\ 



l0 g-y C 1 + 48708 ~~ L 900000 *• ' TTT V 2 j.J 



>< L lo g- la ~ 0-000044584 (S - $')]• 



