Technical Chemistry. - - 2a 
Oleic acid (red oil) soap, - - - == 8800-95 
Palm oil “ - - - = 3588°85 
Tallow 43 - - - == 3300°95 
Cocoanut oil ss - - = 3065°45 
Calculating from these weights how much of each of the other soa 
would be required to replace 1000 pounds of tallow soap, the following 
quantities will be found: 
1151 Ibs. of Oleic acid soap, @. ¢., 15°1 p.c. more than of tallow soap. 
1087 “ “ Palm oil soap,2e, 87 * e 
928 “ “ Cocoanut oil soap, é.e., 7°2 “ Jess than 
Differences like these must certainly be of importance in practice ; 
and could, doubtless, be detected by direct experiment, if any one would 
undertake a comparison of the various kinds of soap,—a research which 
would not be easy however.—Beetiger’s polytechnisches Notizblatt, 1860, 
xv; 65. 
11. Pig-iron which contains Copper cannot be puddled; by Dr. C. 
List.—It has been stated as a matter of belief among practical iron- 
workers in Germany, that pig-iron which contains copper cannot be 
puddled ; assertions having even been made, that when one puddler 
wishes to annoy another he will sometimes throw a bit of co per—a 
small coin, for example, into the furnace, so that the iron cannot be 
”? 
ae 
of the phenomena which ordinarily occur, when iron is pnddled, ap- 
time that the balling together of the iron should have commenced, it 
i it was therefore 
Ibs. having been lost in the scales and slag. Analyses [for details of 
which, see the original memoir,] were made of the ori a 
h 
it lay beneath the scales, 
ved from the furnace, (il 
: s | 
Bileon; Maar oes Mag gg 029 
‘Sulphur, - ~- | =" 098 alae. 
Manganese, 2°’ $56. le 
