124 
J. A. Baker 
the gas was still passing the flask and contents were cooled by 
pouring cold water over the former. The flask was then discon- 
nected from the apparatus, 5 cc. of good starch solution were 
added to its contents and titration was effected by means of the 
standard iodine solution. The thiosulphate solution was used 
to tritrate back if the end point was passed. The results for tin i 
are here tabulated: Ij 
Analytical Results. 
pb. 
Sn. 
Sb. . 
Total. 1 
'78.92 
5-52 
15.21 
99-65 
Magnolia Metal 1 
79-34 
5-50 
15.01 
99-85 
[78.69 
5-93 
1535 
99-97 
1 
[ 82.30 
2.24 
15.24 
99.78 
Eagle A 
82.42 
2.13 
15-14 
99.69 
[82.81 
2.07 
14-73 
99.61 I 
1 
[84.61 
3.08 
12.22 
99.91 
Frictionless <j 
84.72 
3-07 
12. II 
99.90 
1 
[84.27 
323 
12.27 
99-77 
Mystic <! 
[82.40 
4-53 
13-23 
100.16 
1 82.47 
4.40 
12.92 
99-79 ! 
[82.82 
4-03 
13-13 
99.98 1 
III. BABBITT ANALYSIS BY THE METHOD OF H. YOCKEY. 
Yockey’s method was published in the Journal of the American || 
Chemical Society for May, 1906. Below is the method of Yockey jj 
as modified. The methods for lead and tin are just as he de- | 
scribes them, but it was found impossible to secure results for anti- jl 
mony by his method, hence the method described below for anti- jj 
mony was substituted. This method proved to be much shorter Ij 
than Low’s method, and the results are quite as satisfactory. . 
Weigh into a 250 cc. beaker 0.5 grams of. the finely divided ! 
alloy. Add 20 cc. of nitric acid (sp. g. 1.2) and put on the water- jj 
bath. When the alloy is completely decomposed (one or two hours) |‘ 
put in an air bath and evaporate to complete dryness. Bake at || 
120° for one hour. Remove from the oven, cool, moisten with one 
cubic centimeter of nitric acid, add 50 cc. of water and boil vigor- || 
ously for five minutes. Filter off the mixed oxides of tin and j 
antimony, wash with hot water, dry, ignite in a porcelain cru- 1 
