130 



(3.) On the Preparation of Hippuric Acid. 



The author, after describing this acid, and the interest attached 

 to it, gave an improved, easy, and productive method of preparing 

 it, and exhibited specimens of the acid so prepared. 



The process consists in boiling the urine of the horse with lime, 

 and then rapidly boiling down the filtered solution, after which the 

 addition of hydrochloric acid causes a deposit of impure hippuric 

 acid. This is easily purified by a repetition of the process of boil- 

 ing with lime, &c. 



The following Donations to the Library were announced : — 



The American Journal of Science and Arts. By Professors Silliman 



and Dana. Second Series, No. 6, 8vo. — B^ the Editors. 

 The Quarterly Journal of the Geological Society. No. 9, 8vo. — By 



the Society/. 

 The Journal of the Royal Asiatic Society. No. 17, Part II., 8vo. 



— By the Society. 

 Resultate des Magnetischen Observatoriums in Miinchen wahrend 



1843-4-5. Von Dr J. Lament. 4to. — By the Author. 

 Travaiix de la Commission pour fixer les Mesmes et les Poids de 



I'Empire de Russie, rediges par A. Th. Kupfler. 2 vols 4to, 



1 vol. folio. — By the Author. 

 Memoires de la Societe Geologique de France. Deuxieme Serie. 



Tome II., premiere Partie. — By the Society. 

 Aimuaire Magnetique et Meteorologique du Corps des Ingenieurs 



des Mines de Russie, par A. T. Kupflf'er. Annee 1843, Nos. 



1 and 2, 4to. — By the Bussian Government. 

 Carte Climatologique de Varsovie, par Albert Jastrzebowski. One 



Sheet. — By the Author. 



Monday^ bth April 1847. 



Sir THOMAS MAKDOUGALL BRISBANE, Bart., 

 President, in the Chair. 



The following Communications were read : — 



1. Remarks on the Hypothesis of Progressive Development 

 in the Organic Creation. By Sir G. S. Mackenzie, Bart. 



This paper the author consideied as nothing else than an abstract 

 of the thoughts he entertained on the subject. His object was to 

 shew there iva> no analogy in nature, rendering a prospective law 



1 



