to a most fine. poudes which is mixid with aqueous ; nickel sulphate ‘solu 
a thin paste, then treated with the calculated amount of caustic soda 
‘up after addition of water, and poured in cold water. ea Has d 
no more alkaline reaction. Finally, the precipitate was dried a 149° audi 
an exceedingly fine powder. For reduction, the authors used a simple electric 
built of a copper tube surrounded by a resistance coil and further by a wider 
iron pipe, the space between both being filled with kieselgur (diatomite). A glas 
was inserted in the copper tube and filled to about one-half with 100 to 120 g. of hee 
clay-nickel-powder. For heating, monophasic alternating current of 110 volts. was used, — 
the most favourable temperature for the reduction being about 3/0 to 380°. The glass — 
tube was closed at both ends with india-rubber stoppers permitting of conducting ‘the 
hydrogen current in either direction alternately. A skilful contrivance enabled continual | 
shaking the powder in the tube to and fro. Complete reduction of 120 g. of the clay- 
_ nickel-powder took 46 to 60 hours. The cooling is carried out in the beginning - in fs 
current of hydrogen, later on in carbon dioxide. The powder thus obtained catches — 
fire on exposure to the air and burns down gradually. In sealed glass tubes filled with | 
carbon dioxide, the powder may be kept a fairly long time, apr areas without losing» ‘ 
much of its activity. ; 
For reduction, the hydroxymethylene camphor is dissolved in 10 to 50 times its 
weight of 50 p.c. alcohol, or its neutral sodium salt is dissolved in water. For one : 
part of the preparation, two parts of the nickel powder are used. Hydrogen is then 
introduced under an excess pressure of about 1.30 m. water column. The freshly- 
prepared pyrophoric nickel powder reduces water rather violently. The hydrogenation - : 
carried out, the alcohol is driven over by steam and the residual aqueous solution, 5 
together with the nickel-and-clay powder is carefully extracted with ether. The yield 
amounts to 80 to 95 p.c. ‘of the theory. Camphyl carbinol boils at 139 to 140° (9 mm. a 
d*° 1.0502. It is a colourless and odourless liquid, the vapours of which ‘smell faintly 
camphoraceous. The taste is bitter and burning. Purification of the camphyl carbinol - 
is effected best by means of its calcium chloride compound. On treatment with PBrs | 
it yields the hydrobromide, camphyl bromomethane (Ill), a pleasantly-smelling body 
melting at 65.5 to 66° and crystallising in long, white, flat needles. The hydrochloride, — 
camphyl chloromethane (from camphyl panier and SOCI,) melts at 53 to 54°. - a 
On oxidising camphyl carbinol with chromic acid in glacial acetic acid solution, : 
camphor quinone (m.p. 197°) resulted. Oxidation with sulphuric acid and manganee 
dioxide led to a minute amount of a body melting at 201°. . a 
The benzoyl compound of camphyl carbinol is prepared best by shake the dustin 1 C 
with benzoyl chloride in pyridine solution; m.p. 95 to 97°. Attemps to saponify the 4 
ester had not the effect desired, since the carbinol splitted off water and formed — 
methylene camphor (V). Comparatively the best way for saponification was the t 
ment with acids. Camphyl carbinol obtained in this manner showed [@]po0 + 65. 
the same purified by distillation [a]p +-62.11° and from the calcium chloride com: 
[@]p + 62.22°. In the authors’ opinion, the camphyl carbinol obtained by sap : 
the benzoate may, for the present, be considered to. be ep Soar a 
149° (10 mm.). 
