114 Scientific Intelligence. 
the veins is colorless, After removal from the skull and adhering mem- 
branes, the brain is to be rubbed in a mortar to a fine paste and the mass 
shaken in a flask with water and ether. Cholesterin and substances solu- 
ble in water are thus removed; after filtering, the mass on the filter is 
treated with alcohol of 85 per cent at 45° C. in a water-bath and then 
filtered through a water-bath filter. The filtrate is to be cooled to 0° C., 
when an abundant flocky precipitate settles, which is to be collected upon 
a filter and washed with cold ether until the filtrate is free from choles- 
terin. The mass is then to be dried under the air-pump over sulphuric 
acid, moistened with a little water and dissolved in alcohol at 45° C 
The solution, after filtration, is to be allowed to cool gradually upon a 
water-bath to the mean temperature of the atmosphere, when the liquid 
will be found filled with microscopic crystals. These differ somewhat in 
appearance according to the quantity of alcohol employed; they may be 
purified by repeated crystallization. The pure protagon as obtained from 
the brains of various animals was found to have the formula 
CoseHo4,N,PO,,. 
Dried under the air-pump over sulphuric acid, protagon is a light flocky 
powder soluble in hot alcohol and ether, but with difficulty soluble in 
3 
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4 
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foe) 
° 
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er 
e 
na 
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od 
5 
= ° 
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coming at the same time brown, and finally leaves a carbonaceous mass 
which is difficult to burn and which has an acid reaction when moistened. 
mY. 
phosphoric acid is formed, which unites with the baryta, while a new 
&c., of certain writers, are all secondary products of the decomposition 
of protagon. It is to be hoped that the author will pursue the investi- 
gation, which promises results of extraordinary importance and interest. 
n. te rm., CXxxiv, 29. -e 
_2. On an advantageous method of preparing orygen—Firrrmann has 
given a method of preparing oxygen from bleaching powder, which pos- 
; much interest theoretically, and which appears also to offer some 
decided advantages over the ordin rocesses, @ method in question 
depends upon the fact that a concentrated solution of hypochlorite of 
lime, when warmed with a trace of freshly prepared moist xyd of 
