Rosenstiehl has shown that alumina mordants are properly saturated if
two equivalents of lime are used for each equivalent of alizarin, if the
dyeing is done without oil. These figures require to be modified when
the oil is put into the dye beck, as it precipitates the lime. Acetate
of lime at 15 deg. B., obtained by saturating acetic acid with chalk and
adding a slight excess of acetic acid, contains about 1/4 mol. acetate of
lime.--_Bulletin de la Societe Chimique de Paris._
* * * * *
THE SCIENTIFIC AMERICAN SUPPLEMENT.
PUBLISHED WEEKLY.
TERMS OF SUBSCRIPTION, $5 A YEAR.
Sent by mail, postage prepaid, to subscribers in any part of the United
States or Canada. Six dollars a year, sent, prepaid, to any foreign
country.
All the back numbers of THE SUPPLEMENT, from the commencement, January
1, 1876, can be had. Price, 10 cents each.
All the back volumes of THE SUPPLEMENT can likewise be supplied. Two
volumes are issued yearly. Price of each volume, $2.50, stitched in
paper, or $3.50, bound in stiff covers.
COMBINED RATES--One copy of SCIENTIFIC AMERICAN and one copy of
SCIENTIFIC AMERICAN SUPPLEMENT, one year, postpaid, $7.00.
A liberal discount to booksellers, news agents, and canvassers.
MUNN & CO., PUBLISHERS,
37 PARK ROW, NEW YORK, N. Y.
* * * * *
PATENTS.
In connection with the SCIENTIFIC AMERICAN, Messrs.
Pages:
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133