Lene Sioux City Academy of Science and Letters. 
I. 
PHYSICAL PROPERTIES OF LIGNITES. 
Loss of Water 
Specific After Standing in 
No. SAMPLE AND LOCALITY Laboratory 
Gravity 130 Days. 
Per Cent. 
1 Lignite, lumps from shaft See. 23, 
T. 29 N., R. 7 E., Dakota county, 
INe@ bras kay ee Re hy A eieune ns Gree a 1.35 15.81 
2 Lignite, lumps from shaft See. 29, 
T. 27 N., R. 9 E., Dakota county, 
Nebraska see UG ee eee Canes 1.28 17.32 
3 Lignitie coal, Rock Springs, Wyo- 
LUE TR Ps Pha Se NU MAG ESR Ue at Rae ey 1.285 (Not tested) 
II. 
a PROXIMATE ANALYSES OF DAKOTA COUNTY LIGNITES 
—AIR-DRIED BASIS. 
ioe PERCENT AGES 
» ) 
eh SAMPLE AND 83 b3 is Vola: ae 
. S O1St- t 
eh Bu | 35 com: a Ash |Sulph’r 
Oo ‘ ti 
he as ayy ure Leas Carbon 
1 | Drillings, Hole No. 2, 
Sec. 22, 29N., 7 E......... 80 | 26 | 4.99 | 41.63 | 27.14] 25.72] 1.20 
2 | Drillings, Hole No. 5, 
Sec. 22, 29N., 7 E......... 65 | 22 | 4.03 |51.40 | 33.66] 10.91 b 
3 | Lumps from shaft, Sec. 
22 TO QUN I iH  ee a 82 | 23 | 6.85 |31.05 | 45.08] 16.15} .86 
4 | Lumps from shaft as 
AN shed See Es tea 82 | 23 | 6.47 |27.24c] 49.27| 16.23] .&6 
5 | Lumps from outcrop, 
Secai205 214 Nia Ope eee | ees 22 117.85 | 44.27 | 26.00] 10.91} 1.14 
6 | Lumps from shaft, Sec. 
Poohy A IN ag) Liars recess 36 6 | 6.77 |54.16 | 28.66] 8.65) 1.75 
| a. Analyses by the writer. 
| b. Sulphur not determined. Specimen showed no iron pyrites. 
c. Heated only to low red heat with Bunsen burner to expel vola 
tile matter, instead of using blast-lamp. 
