all. The whole of the coal was therefore crushed lo under G6 mm. and 
treated in a fine coal washer. 
The results of this test are collected in the following table. All 
weights are dry weights, and are given in weight °/, of the quantity 
of the raw material treated. 
TABLE N. III 
Coal B equals 100°/, by weight, percentage ash, 49,4 ha 
N. PRODUCTS WEIGHT /o| ASH °/o 
4 |COalus Is 6 | * © 8 4 we Re we we Oe ew we we RS 16.24 25.4 
2) (Goal wate INT so cea ba, cee ak MB esc cd wn RE ae ee > a aE SG 49.46 48.1 
8 ASWale a, a a) Go ae Re ee OH 9 Ok Aol ce: Ve ee ie! as 21,50 68.6 
# (Sludge 2 ne ye kw ee Re RR HR Re ee ows 12.80 41.8 
EOtal. sh si ea ea wa ee we os 100.00, _ 
The results show that even when crushing down to under 6 mm, 
only 16.24 °/, of coal, containing 25.4 °/, of ash, are obtainable ; there- 
fore treating this coal would nol pay. 
MASCHINENBAU-ANSTALT HUMBOLDT, 
(Signed) W. F. BARTEL, 
Lieut. Esser. 
In order to check the determinations of Lieut. Esser, samples of 
the different grades of coal, slate, slimes, etc., into which the coal from 
Santa Catharina, and Rio Grande do Sul, had heen separated at Kalk, 
were collected and transmitted to Prof. B. H. Hite at Morgantown, West 
Virginia, U.S. A., in whose laboratory these samples were analyzed 
with the following results : 
