obtained from Wood and Pit-coal, 313 



oxide from each of these varieties, the following arrange- 

 ment will be necessary : 



■ 1st, soft coal free, white ash, 



2d, , red ash. 



3d, - • -caking, white ash. 



The following ate the results of live specimens analysed 

 from the 1st measure of the Great Coal Field around Glas-r 

 gow, distinguished bv the following coal names; com- 

 missary coal, upper coal, double coal, &c, corresponding 

 to No. J.— 



100 parts of oxide of — 



1st specimen contained of ashes 3*14 



o,\ __ „__ 4-0.5 



3d ■ — ■ 2'98 



4th 3-55 



,5th 2-8.0 



The four following varieties are extracted from a number 



of results, of which they may serve as an average ; many 



of them, taken from the same measure, and even in con^ 



tact with the former. These correspond with variety No. 2. 



100 parts of oxide of — 



1st specimen contained of ashes 37-15 



2d — — — . 36-10 



3d — - — — 30-70 



4th - ■ 25-50 



The following results are, taken from experiments with 

 welding coals, No. 3. In general these coals leave a red 

 or brownish-red ash. Those found in Yorkshire:, and used 

 at the furnaces for iron-making, contain the whitest ash. 

 100 parts of oxide of— 



1st specimen contained of ashes 2-55 



2d — _ - 6-44 



3d — — — 5-82 



4th — 8-15 



5th r 4'75 



6th — » 3-85 



No. 4, or that variety of soft coal that welds and leaves 



an ash of a red colour, or of any intermediate shade betwixt 



alightochrev brown and a deep red brown, contains a greater 



variety of alloy than any other description of coal. 



The coals got at the Newcastle and Sunderland collieries are 



chieflv 



