COL. D. G. PITCHER, The rounded fragments are almost wholly composed of calcic carbonate in a micro-crystalline or Gwalior. W. COLDSTREAM, Deputy Commissioner, Simla district. amorphous condition with large quantities of light green chloritic minerals in some, and hydrated iron-oxide in other fragments. The whole is cemented with distinctly crystallized calcite, the crystals in which invariably exhibit zones of ferruginous inclusions. List of Assays and Examinations made in the Laboratory, Geological Survey of India, during the months of February, March, and April, 1891-concluded. Sample Nos. 3. 7, 8, f, f, 10, 14, 15, and 16, carbonaceous shale. ERRATA. MEMOIRS, GEOLOGICAL SURVEY OF INDIA, VOL. XXIV, Pt. 1. 7, line 1, for 1854 read 1855. 7, line 5 from bottom, for Q. J. Geol. Soc., London, XI, 555, read J. A. S. B. XXIV, 347-353. 7, line 3 from bottom, for V, 179 read XI, 555. 8, in marginal heading of last paragraph, for 1886 read 1866. 15, line 10, for Omerghor read Oomerghor. 32, in well section, insert White sandstone-15′ 0′′ above Coal-1' 0". 35, line 2 from bottom, for Gogra read Gogri. 58, line 2 from bottom, for deposited read dissolved. In map I (1"=4 miles), in scale of horizontal section, for 1056' read 10560'. In upper margin, for Singora field read Sirgora field. The small outlier north of Rajegao coloured as Trap should be coloured as Motur s. In map II, in upper margin, for "Singora" read "Sirgora." Boring Exploration in the Daltongunj Coal-field, Palamow; by TOм D. LA TOUCHE, B.A., Deputy Superintendent, Geological Survey of India. (With a map.) Introductory remarks.-The investigation of the Daltongunj coal-field by means of borings, carried out during the past cold weather, was undertaken with the object of testing the capabilities of the field for the production of coal in sufficiently large quantities to warrant the construction of a railway that should make the coal available for use in Upper India,-a partial exploration made under the supervision of Dr. Saise in 1890 having raised hopes that coal of good quality would be found in abundance, his estimate giving a total quantity of "not less than 161,377,000 tons of coal containing 117 per cent. of ash," The borings recently made have, I regret to say, led to the conclusion that the estimate made by Dr. Saise both as to the quantity and quality of the coal, was too favourable; and though there is undoubtedly a large amount of coal in the field, yet the conditions of its distribution are such as to render it extremely doubtful whether a sufficiently large output could be obtained to encourage the construction of a railway for the sole purpose of carrying the coal to other parts of India. It will be unnecessary here to give any account of the physical features of the district of Palamow in which the coal-field under discussion is situated, as these have already been fully described by Mr. Hughes (Memoirs G. S. of I. Vol. VIII, Part 2), but the more accurate survey I was enabled to make of the area actually occupied by the coal-bearing rocks has led me to differ in some points from the conclusions arrived at by Mr. Hughes, and before discussing the borings, it will be advisable to draw attention briefly to the surface conditions in this area. * Records G. S. of I. Volume XVI, page 175. Surface rocks.-The coal-bearing rocks (shown by Dr. Feistmantel from their fossil contents to be of Karharbari age*) occupy an area of about 30 square miles in the valley of the Kod at its junction with its tributaries the Amanat and Durgnoti. On all sides they are surrounded by Talchir shales, the boundary being for the most part very obscure except on the north side, where it is marked by a strong fault, which brings the coal measures nearly into contact with crystalline rocks. Over the greater part of this area the rocks visible at the surface are coarse, friable sandstones, consisting almost entirely of angular or slightly rounded grains of quartz and more or less decomposed felspar, showing much false bedding, and often containing strings of A |