New YorK AGRICULTURAL EXPERIMENT STATION. 381 
one brand, “ Niagara,’ contained appreciable amounts of sedi- 
ment. This appeared olive-green as seen in the mixture. The 
table together with the total percentage of sulphur in the 
specific gravity and Beaumé readings are given in the following 
mixture. 
TABLE XIII.— SpEcIFIC GRAVITY, ETC., IN COMMERCIAL PREPARATION, 
Specific gravity. Degrees Beaumé. 
Amount of 
combined 
Sample.! Name of brand. | gojution | Solution | Solution | Solution rae 
with without with without mixture 
sediment. | sediment. | sediment. | sediment. : ; 
Teer Cle 
A Girasselli eae a: — 1.2933 — SoMa 25.68 
B Eo thie ahah I Sacha — 1.2820 — S240 24°52 
C - : a 1.2810 —_ Pada Wat’ 24.47 
D INIara Tae nee: 1.280 1.2667 Slesk 30.4 23.28 
E oe ee aN leseick Pot 39.4 34.5 25 .43 
F Lt Fed Spent te 1.380 1 Pagal 40.0 sil al 2245 
G The eee 1.324 1.2770 S000 31.4 Zot 
H UE ROR oe oo Ga neeees — 1.2740 —_ OLE 24 .34 
I Uo eat a, oe — 1.2960 — 33.0 25.60 
ad SPT As cs. eresad —— 1.2740 —_— Poy bs 24 .32 
K Thomsen <<. 1 s- 1.2270 — 26.8 18.73 
L Re a Se Aa — 1.3050 —_— 33.9 26.49 

In examining the preceding table, it is noticed that the com- 
mercial preparations vary somewhat widely in respect to the 
amount of combined sulphur in solution, ranging from 18.73 
to 26.49 per ct., though most of them are approximately be- 
tween 23 and 25 per ct. The degrees Beaumé of the clear solu- 
tion vary from 26.8 to 34.5. There is a fairly uniform relation 
between the degrees Beaumé and the amount of combined: sul- 
phur in solution; in general, one degree Beaumé corresponds 
approximately to 0.76 per ct. of combined sulphur in concen- 
trated solutions within the limits of 25 to 33 degrees. On the 
basis of this average relation, we can calculate approximately 
the percentage of combined sulphur in solution corresponding 
to a given degree Beaumé within the limits of 25 and 35 de- 
grees. From these and other data we can also estimate the 
