370 Miscellunies. 
symmetry and analogy. For when the substance is indicated by 
2AS+C?82, there is no longer any obvious identity with 2A+ 
3C +48, which is the real result of the analysis. 
Substance. Berzelius’ Notation. Whewell’s Notation. 
Phos. lime, sp 3C 49P 
Felspar, KS*+3AS3 (K-+38)+3(A+38) 
Alum, KS?42AS?+48-Aq. 9-(A+ 3S)4+K +28-+448 : Aq. 
Coefficients are, in all cases, used instead of indices.—Id. 
9. Preservation of Blood.—Sugar refiners and others are often 
inconvenienced by the difficulty of obtaining blood at the time when 
it is required for use. M. Toursel has endeavored, in part, to Te 
move this difficulty, by proposing a method of preserving this agent 
for some time without injury. It consists in putting the blood into 
bottles or other vessels with very narrow mouths, and being careful 
to fill them up to the neck ; a layer of oil, to the depth of at least 
half an inch, is then put upon it, to cut off communication with the 
atmosphere, and the whole is left to itself. M. Toursel states that 
he has in this manner preserved blood, with all its physical and chem- 
ical qualities, from the first of December, 1827, to January, 1829. 
10. Presence of Manganese in the Blood.—(Prof. Wurzer, of 
Marburg.)—-In some analyses of human blood, according to Engel- 
hart’s method by liquid tests, Prof. W. was led to suspect ‘that, be- 
sides the usual results, he had also obtained a small quantity of man- 
ganese ; not being, however, quite sure of the correctness of his anal- 
yses, he was induced to repeat them in the following manner :—The 
blood, which had been obtained by venesection, on the day before 
the experiment was ignited in an open crucible, the incinerated mass 
oxidized by nitre, and then diluted with water ; the residuum was 
dissolved in muriatic acid, and the iron precipitated from the solution 
by succinate of ammonia. As the precipitate contained also some 
phosphate of lime, it was again ignited, and then dissolved in mur 
atic acid ; the phosphate of lime was separated from the solution by 
alcohol, the excess of the latter expelled by heat, and the iron pre- 
cipitated by ammonia. By boiling the filtered liquid with carbonate 
