768 
Notes . 
[November, 
caries, held at Hanover on September 4, was exhibited a collec- 
tion of pharmaceutical antiquities, including a specimen of 
genuine oriental bezoar, a goblet of metallic antimony, formerly 
used for imparting a purgative effeCt to wine or beer, a venerable 
sample of “ Album Gisecum,” a selection of chemical apparatus 
inscribed with alchymistic symbols, a gaily-adorned jar for con- 
taining “ Mithridate,” &c. 
Instead of linseed-meal as a lute for distillatory apparatus, 
Thanisch proposes the use of strips of brown paper smeared 
over with bookbinders’ paste to which one-eighth of glycerin has 
been added. 
The chemical purification of waste waters has been studied by 
Jean de Mollins. The author, who has dealt with the waste 
waters from the woollen mills of Roubaix, recommends milk of 
lime and sulphate of alumina, together or separately. He con- 
siders that the aCtion of the aluminous hydrate upon the organic 
impurities of water is quite analogous to its behaviour with dis- 
solved colouring-matters which it throws down in the form of 
lakes. He also points out that clay, if diffused in water, becomes 
coagulated by the presence of certain salts, and carries the 
organic impurities down with it. 
A new method of producing varnish is proposed by Dr. E. 
Schrader. He causes ozone to aCt upon linseed oil : it is at 
once perfectly bleached and brought to the proper consistence 
without the aid of fire. 
From a report by M. de Luynes (Societe d’Encouragement 
pour l’lndustrie Nationale) on M. C. Lorilleux’s manufacture of 
printing and lithographic inks, we find that two kinds of varnish 
are employed in the manufacture of printing inks ; the one ob- 
tained by boiling linseed oils, and the other from a mixture of 
resin and resin oil, the latter being chiefly used for newspapers 
where rapid drying is of importance. M. Lorilleux allows his 
linseed oil to rest for two years at a constant temperature. It 
is then boiled by means of hot air, at a distance from the fur- 
naces so as to remove every risk of fire. A mass of 2500 kilos, 
is boiled from twenty-four to fifty-six hours, and is stirred by a 
mechanical agitator. The varnish thus obtained is limpid and 
flows well. The lamp-black is produced either by means of 
specially constructed lamps or by the decomposition of naph- 
thalin oils, which fall by drops into a heated retort. The gaseous 
products are carried off by tubes, at the end of which they are 
burnt under sheet-iron bells, whilst the black is carried off bya 
current of air into large chambers. It is afterwards submitted 
to calcination. All the inks, lithographic or typographic, are 
submitted to a practical trial before being sent out. 
Some researches on damage to the soil and the crops by the 
waste waters and the gases from manufactures have been insti- 
