NOTES AND ABSTRACTS IN CHEMISTRY AND PHARMACY. 847 
This interesting body belongs to the group which has yielded nearly all our 
angesthetics, and it will be seen on inspecting the tabulated arrangement below, 
that there is now but one member missing, to be supplied, we may safely hope, 
by future research. The tetriodide of carbon is the body which yet remains to 
be found to complete the series. 
Methyl . 
Chloride. 
. CH 3 .C1 
Bromide. 
CII 3 Br 
Iodide. 
CH 3 I 
Methylene 
Dichloride. 
. CH 2 C1 2 
Bibromide. 
CH 2 Br 2 
Diniodide. 
ch 2 i 2 
Formyl . 
Trichloride. 
. CHClg 
(Chloroform.) 
Tribromide. 
CHBr 3 
(Bromoform.) 
Tri-iodide. 
CHI, 
(Iodoform.) 
Carbon . 
Tetrachloride. 
. CC ) 4 
Tetrabromide. 
CBr 4 
Tetriodide. 
CI 4 
(Missing.) 
Method of Imparting to Ivory, Bone, and Horn a beautiful Red Colour. 
Take 4 grams of picric aeid and dissolve in 250 grams of boiling water ; 
when cold, add 8 "grams of liq. ammonite: Dissolve also 2- grams of magenta 
(crystals) in 45 grams of alcohol, dilute with 375 grams of hot water, and acid 
50 grams of ammonia. As soon as the red colour of the magenta solution has 
disappeared, the two solutions are mixed together, making a bulk of liquid 
amounting to about half a litre. Ivory and bone should be placed in veiy weak 
nitric or hydrochloric acid first, before being immersed in the ammoniacal 
liquid 5 wood cannot be dyed in this liquid unless it has been previously painted 
over with paste made from flour. If to the ammoniacal liquid some gelatine 
solution is added,- it may serve as a red ink which does not attack steel pens. 
By varying the proportions of the magenta and picric acid,.the tints obtained 
may be varied from a bluish-red to a bright orange-red. The desired colours 
do not appear till the ammonia is evaporated .—Revue Hebdomadaire de Cidmie, 
April 21 st, 1870. 
Metallic Hydrogen. 
At a recent meeting of the Lyceum of Natural History in New Pork, a 
paper was read by Dr. Loew, Assistant in the College of New York, “ On the 
Preparation of Hydrogen Amalgam.” The researches of Graham went to show 
that hydrogen could be alloyed with palladium, and that it was also contained 
in meteoric iron. He condensed the hydrogen in the palladium, and came 
nearer proving its metallic character than any other person had done. Schoen- 
bein in his search for ozone, found a method for making the peroxide of hydrogen, 
which brought him to the very threshold of discovering hydrogemum. Schoen- 
bein’s experiment was thisAn amalgam of zinc and mercury is violently 
agitated in water; the water is then filtered, and, on being examined with 
iodide of starch and protosulphate of iron, will be found to contain peroxide of 
hydrogen or oxygenated water. Dr. Loew has carried the investigation further, 
and has, instead of oxidizing the hydrogen, succeeded m combining it with the 
He takes an amalgam composed of not more than three or four per cent, of 
zinc and shakes it with a solution of bichloride of platinum ; the liquid becomes 
black and a dark powder settles to the bottom. The contents of the flask are 
then thrown into water, and hydrochloric acid added to dissolvethe excess ot 
zinc. The amalgam of hydrogen and mercury at once forms in a brilliant 
voluminous mass, resembling in everyway the well-known ammonium amal- 
gam It is soft and spongy, and rapidly decomposes, but without any smell of 
ammonia. The hydrogen escapes, and soon nothing but pure mercury is left in 
