334 -D?'. Prout on a new Portable Hydrometer. [May, 



his mind with accuracy that whole which they contribute to 

 form ; so the sketches here given may place it within the reader's 

 power to fill up the outline, and to form a somewhat just concep- 

 tion of the penetration, the depth, and the solidity of judgment, 

 of the uncommon versatility of talent, of the richly various pur- 

 suits that ever aimed at adding to the happiness of the species, 

 and of the excellent and warm heart that forms the character of 

 Edelcrantz. 



To those in whom this short notice of his life shall awaken a 

 desire of more intimate acquaintance with the details of his 

 history, we may recommend the masterly treatises of which he 

 is the theme, and which have been already published concern- 

 incr him. These are the Discourse over Baron A. N. Edelcrantz, 

 already in the second edition, delivered on the 7th April, 1821, 

 by Gust. Lagerbjelke : the Eloge over President Edelcrantz by 

 J. P. Billberg, in the Transactions of the Royal Academy of the 

 Military Sciences for 1821 ; and the Discourse (yet unprinted) 

 over Edelcrantz in the Swedish Academy, by C. P. Hagberg, 

 within which society we fondly anticipate that his memory will 

 long remain embalmed in the esteem and gratitude of all who 

 revere virtue, or love their country. 



The translator's office here expires : nor will he obtrude any 

 observations of his own upon the reader, before whom he has 

 endeavoured to place some of the merits and interesting life of 

 Edelcrantz. He does not in the least doubt that his exertions 

 in this sphere will be considered as well bestowed by the lovers 

 of science in this country, to whom the plain and simple narra- 

 tive just closed cannot fail to prove a subject of agreeable and 

 useful meditation. It is his only regret that at this distance of 

 time from the death of Edelcrantz, such a character as that of 

 the illustrious Swede should not yet have found an abler pen, to 

 do it the justice it deserves, either in an original treatise, or in 

 a happier translation. 



Article II. 



Description of an Instrument for ascertaining the Specific Gravity 

 of the Urine in Diabetes and other Diseases. By W. Prout, 

 MD. FRS. 



(To the Editors of the Annals of Philosophy.) 

 GENTLEMEN, Aprils, 1825. 



As the specific gravity of the urine is a point of considerable 

 importance in many diseases of that secretion, and particularly 

 in diabetic affections, and as the common method of determin- 

 ing this by weighing, 8cc. is troublesome and tedious, I was 

 induced some time ago to have a small portable hydrometer 



