a—9

12

The general sample, including the stony bands, gave on analysis the result shown in (A), while the Wetter-grade coal picked free from stone gave the results as shown in (B) :— A. B. Fixed carbon .. .. .. .. .. 23-03 37-78 Volatile hydrocarbons .. .. .. .. 38-05 45-48 Water .. .. .. .. 11-00 10-82 Ash .. .. .. .. 27-92 5-92 100-00 100-00 Sulphur .. .. .. .. .. 3-05 3-38 Calorics pel gram .. .. .. .. .. 5,964 British thermal units per pound .. .. .. .. 10,735 Evaporative power per pound from calorimeter .. .. 11-12 lb. Practical evaporative power (60 per cent, efficiency).. .. 6-67 ~ (?'.) Dandy Gully No. 2.—The upper seam in Dandy Gully (No. 2) is 7 ft. 7 in. in thickness, and is made up as follows, measuring from the top to the bottom : 2 ft. 3 in. of excellent coal, | in. of clayey selvage, 1 ft. 7 in. of fair coal. ;| in. of sandy selvage, 1 ft. 11 in. of good coal, 1 ft. 9 in. of highly carbonaceous shale with some impure coal. The dip of the seam is in a south-easterly direction, at an angle of s°. Analyses of the material taken from the whole seam gave the result (A) below, while that taken from the better layers only gave the result as shown in (B) below. A. B. Fixed carbon .. .. .. .. .. 32-08 39-85 Volatile hydrocarbons .. .. .. .. 39-13 42-89 Water .. .. .. .. .. 13-07 12-01 Ash .. .. .. .. .. .. 15-72 5-25 100-00 100-00 Sulphur .. .. .. .. .. 2-82 3-25 Calories per gram .. .. .. .. .. 5,871 British thermal units per pound .. .. .. .. 10,568 Evaporative power per pound .. .. .. .. 10-95 lb. Practical evaporative power (60 per cent, efficiency) .. 6-57 ~ (k.) Lower Retaruke No. I.—At station 7 (see map) on the Retaruke River a seam of coal is exposed on the left bank. It is about 6 ft. in thickness, and is made up from the roof to the floor as follows : 2 in. of good coal, \ in. of clayey selvage, 1 ft. 6 in. of good coal, 2 in. of sandy carbonaceous shale, 1 ft. 4 in. of fairly good coal greatly improving downwards, \ in. of sandy selvage, 1 \ in. of good coal, \ in. of sandy selvage, 2 ft. 3 in. of good coal, excellent at the top but somewhat inferior lower down, 1 in. of highly carbonaceous shale containing a little fairly good coal. Of this, all may be con : sidered as good fuel excepting about 1 ft. 3 in. altogether. The 2 in. of sandy carbonaceous shale seems rather indefinite, and apparently passes into fairly good coal along the dip. The \ in. and \ in. of sandy selvage are more constant breaks. The dip is in a south-easterly direction, at an angle of 10°. The seam is highly friable, and not at all rusty at the outcrop. The altitude of the seam is 1,498 ft. Appended are the analyses of the samples which were taken (A) from coal with stone in the higher part of the seam, (B) from coal with stone in the lower, and (C) from the better part of the coal, picked free from stone : — A. B. C. Fixed carbon .. .. .. 29-48 30-32 41-15 Volatile hydrocarbons .. .. 40-14 37-93 41-06 Water .. .. .. .. 12-21 12-45 12-07 Ash .. .. .. .. 18-17 19-30 5-72 100-00 100-00 100-00 Sulphur .. .. .. .. 3-67 2-57 3-01 Calories per gram .. .. .... .. 5,721 British thermal units per pound .. .. .. 10,298 Evaporative power per pound from calorimeter .. .. .... .. 10-67 lb. Practical evaporative power (60 per cent, efficiency) .. .... .. 6-40 „ ((.) Jackson's Creek. —The seam exposed in Jackson's Creek, a right-hand branch of the Retaruke, is 7 ft. 7 in. in thickness. This seam, which is very much weathered, is so broken up into shaly, clayey, and sandy bands that it seems unnecessary to enumerate the nineteen variations in the section taken. Taking all the different laniinse of fair and good coal, the total thickness is about 3 ft. 6 in., of which only 1 ft. 10 in. is unbroken by stony bands. Possibly the seam would show improvement further away from the outcrop. The dip is in a south-easterly direction, at an angle of 6°, and the seam is exposed at ail altitude of 1,743 ft.