Laggan, co. Perth.

*Ledaig, co. Argyll. Proc. S. A. Scot., vols. ix. and x.

*Leven, L., co. Kinross. Ibid., vol. xxii., and Lake Dwellings of Europe, p. 492. *Loch-of-the-Clans, co. Nairn. Proc. S. A. Scot., vol. v.

Loch-in-Dunty, co. Nairn. Ibid.

*Loch-inch-Cryndil, co. Wigtown. Ibid., vol. ix.

Lochindorb, co. Moray.

*Lochlee, co. Ayr. Ayr and Gal. Arch. Association, vol. ii.; Proc. S. A. Scot., vol.

xiii.; and Ancient Scot. L. Dwellings.

Lochmaben, co. Dumfries. Proc. S. A. Scot., vol. vi.

*Loch-na-Mial, Island of Mull. Ibid., vol. viii.

Lochnell, co. Argyll. Ibid., vol. ix.

Lochore, co. Fife. Ibid., vol. vi.

Lochrutton, co. Kirkcudbright.

*Lochspouts, co. Ayr. Col. Ayr and Gal. Arch. Association, vols. iii. and iv.; and

Ancient Scot. L. Dwellings.

Lockwood, co. Dumfries.

Lochy, L., co. Inverness.

Lomond, L., co. Stirling.

Lotus, L., co. Kirkcudbright. Proc. S. A. Scot., vol. xi.
Machermore, L., co. Wigtown. Ibid., vols. ix. and x.

Morall, L., co. Perth.

Morton, co. Dumfries.

Moulin, L. (drained), co. Perth.

Mountblairy, co. Moray.

Moy, L. (Ellan-na-Glack), co. Inverness.

Oban (Lochavoullin), co. Argyll. Lake Dwellings of Europe.

Ore, L., co. Dumfries.

Peel Bog, co. Aberdeen.

Quien Loch, co. Bute. Proc. S. A. Scot., vol. iii.

Kannoch, L., co. Perth.

*Ravenstone, L., co. Wigtown. Col. Ayr and Gal. Arch. Association, vol. v.

Rescobie, L., co. Forfar.

Rothiemurchus, Loch-an-Eilan, co. Moray.

*Sangahar, Black Loch of, co. Dumfries. Dumfries and Gal. N. H. Soc., 1865. Shin, L., co. Sutherland.

Torlundie, drained loch at, co. Inverness. Ibid., vol. vii.

Acrussel, L., co. Fermanagh.

Allen, L., co. Leitrim. Arch. Journal, vol. iii.

Aghakilconnel, L., co. Leitrim.

Aghnamullen ('Glebe Island '), co. Monaghan.

Annagh, L., between King and Queen's County. Journ. R. H. A. Association, 3rd S., vol. i.

Annagh, parish of Kilbarron, co. Tipperary.

*Ardakillen, co. Roscommon. Proc. R. I. Acad., vol. v.

*Ardmore Bay, co. Waterford (submarine). Ibid., 2nd S., vol. ii.; Journ. R. H. A.

Association, 4th S., vol. v.

Arrow, L., co. Sligo.

Aughlish, co. Fermanagh. Ibid., vol. ii.
Ballaghmore, co. Fermanagh. Ibid.

Ballinafad, co. Galway. Ibid.

Ballinahinch, co. Galway. Ibid.

*Ballinlough (4 crannogs)), co. Galway. Proc. R. J. Acad., vol. ix.

*Ballydoolough, co. Fermanagh. Journ. R. H. A. Association, 4th S., vols. i. and ii. Ballygawley, L., co. Sligo. Wood-Martin's Lake Dwellings of Ireland.

Ballyhoe, L. (2 crannogs), co. Monaghan. Journ. Kilk. Arch. S., 2nd S., vol. vi. Ulster Journal of Arch., vol. vii.

Ballykinler, co. Down.

Ballywoolen, co. Down. Journ. Kilk. Arch. S., 2nd S., vols. iii. and iv.

Bohermeen, co. Meath.

Bola, L., co. Galway. Journ. R. H. A. Association, 4th S., vol. ii.

Breagho, co. Fermanagh. Ibid.

Camlough, co. Armagh.

Campsie, near Londonderry. (Report not yet published. See Journal of Royal Society of Antiquaries of Ireland., vol. i. p. 327.)

*Cargaghoge, co. Monaghan. Ibid., 3rd S., vol. i., and 4th S., vol. v.

Castleforbes, co. Longford.

Castlefore, L. (2 crannogs), co. Leitrim.

*Clogherny co. Tyrone. Keller's Lake-Dwellings, 2nd ed.

Cloncorick Castle, L., co. Leitrim.

*Cloneygonnell, L. (3 crannogs), co. Cavan.
Cloonbo, L. (2 crannogs), co. Leitrim.
Cloonboniagh, L., co. Leitrim.
Cloonfinnen, L., co. Leitrim.

*Cloonfinlough (2 crannogs), co. Roscommon.
Europe.

*Cloonfree (2 crannogs), co. Roscommon. Cloonturk, L. (2 crannogs), co. Leitrim. Cloughwater Bog, co. Antrim.

Proc. R. I. Acad., vol. viii.

Ibid., vol. v., and Lake Dwellings of

Proc. R. I. Acad., vol, v.

Ibid.

*Coal Bog (Kilnamaddo), co. Fermanagh. Ibid., 2nd S., vol. ii., and Journ. Arch. Association, vol. xxxvi.

Coolcranoge, co. Limerick.

Corcreevy (Loch-Laoghaire), co. Tyrone.

Corrib, L., co. Galway.

*Cornagall, L., co. Cavan. Journ. R. H. A. Association, 4th S., vol. i.

Cornaseer, co. Cavan. Ibid., vol. vii.

Crannagh MacKnavin, co. Leitrim.

Crannagh, L., co. Antrim. Proc. R. I. Acad., 2nd S., vol. ii.

Crannog-na-n-Duini, co. Donegal.

Crannog-boy, co. Donegal.

Crannog Mac Samhradhain, co. Cavan.

Greenhagh, L. (2 crannogs), co. Leitrim. Journ. R. H. A. Association, 4th S., vol.

vii.

Crumkill, co. Antrim. Notes by Rev. Mr. Buick.

Cullina, near Maryborough, Queen's co.

Currygrane, L. (2 crannogs), co. Longford. Ibid.

Derreen, L., co. Roscommon.

Derreskit, L., co. Cavan.

*Dromiskin, co. Louth. Ibid., 4th S., vol. ix.

*Drumaleague, L. (2 crannogs), co. Leitrim. Proc. R. I. Acad., vol. v.

*Drumdarragh or Trillick, co. Fermanagh. Ibid., vols. ii. and vii.

*Drumgay (3 crannogs), co. Fermanagh. Ibid., vols. i. and ii.

*Drumkeery, L., co. Cavan. Archeologia, vol. xxxix.

*Drumkelin, co. Donegal. Ibid., vol. xxvi.

Drumlane (2 crannogs), co. Cavan. Journ. R. H. A. Association, 4th S., vol. vii. *Drumskimly (3 crannogs), co. Fermanagh. Ibid., vols. i. and ii.

*Drumsloe, co. Fermanagh. Ibid., vol. ii.

Effernan, co. Clare. Ibid., vol. v.

*Eyes, L. (6 crannogs), co. Fermanagh. Ibid., vols. i. and ii.

*Faughan, L., co. Down. Proc. R. I. Acad., vol. vii.

Fort, L., co. Donegal.

Funshinagh, L., co. Leitrim.

Galbally, co. Tyrone.

Glencar, L. (5 crannogs). Wood-Martin's Lake-Dwellings of Ireland. Gortalough, co. Fermanagh. Journ. R. H. A. Association, 4th S., vol. v. *Grantstown, co. Queen. Ibid., N.S., vol. v.

Guile, L., co. Antrim. Ibid., 3rd S., vol. i.

Gur, L., co. Limerick.

Wilde's Catalogue.

Hackett, L. (Cimbe), co. Galway. Ibid., and Keller's L. Dwellings.
Hilbert, L. (Goromna Island), co. Galway.

Inishrush (Green L.), co. Derry. Proc. R. I. Acad., vol. vii.

Joristown (in river Deal), co. Westmeath. Ibid., vol. v.

Kilglass, L., co. Roscommon.

Killynure, co. Fermanagh.

Kilmore, L. (2 crannogs), co. Monaghan.

Kilknock, L., co. Antrim.

Knockany (Lough Cend), co. Limerick.

*Lagore or Dunshaughlin, co. Meath. Proc. R. I. Acad., vol. i., Arch. Journal, vol. vi.

Lane, L., co. Roscommon.

Lankhill, co. Fermanagh.

Leesborough, L., co. Monaghan.

Lenaghan, co. Fermanagh.

*Lisanisk, co. Monaghan. Arch. Journal, vol. iii.

*Lisnacroghera (Craigywarren), co. Antrim. Journ. R. H. A. Association, vols. vi. and ix. Lake Dwellings of Europe.

Lochanacrannog, co. Sligo.

Loughran's Island, co. Antrim. Proc. R. I. Acad., vol. v., and Ulster Journal of Arch., vol. vii.

*Loughannaderriga, Achill Island, co. Mayo. Wood-Martin's Lake-D. of Ireland.

Loughinsholin, co. Derry.

Loughavarra, co. Antrim.

*Loughavilly, co. Fermanagh. Journ. R. H. A. Association, 4th S., vols. ii. and v. Lochlea (3 crannogs), co. Roscommon.

Lough-na-Glack, co. Monaghan.

Lough Cam, co. Galway.

Loughmagarry, co. Antrim.

Proc. R. I. Acad., vol. vii.

Loughtamend, co. Antrim. Ibid.

Loughtown, co. Leitrim.

*Loughrea (4 crannogs), co. Galway, Ibid., vol. viii.

*Lough Oughter (3 or more crannogs), co. Cavan. Journ. R. H. A. Association, 4th S., vol. vii.

Lynch, L., co. Antrim.

Mac Hugh, L. (2 crannogs), co. Leitrim. Ibid.

Macnean, L. (3 crannogs).

Mac Nevin, crannog, co. Galway.

Manorhamilton, co. Leitrim.

Marlacoo, co. Armagh.

Mask, L., Hag's Castle.

Melvin, L., co. Fermanagh.
Moinenoe, co. Fermanagh.

Monaincha, co. Tipperary.

Monalough, co. Meath. Proc. R. I. Acad., 2nd S., vol. ii.

Monalty, co. Monaghan. Arch. Journal, vol. iii.

Monea, co. Fermanagh.

Mongavlin, co. Donegal.

Monnachin, L., co. Monaghan.

*Mourne, L. (2 crannogs), co. Antrim. Journ. R. H. A. Association, 4th S., vol. vi.; Proc. S. A. Scot., vol. xx., and L.-D. of Europe.

*Moylarg, near Cully backy, co. Antrim. (Recently investigated by the Rev. Mr. Buick of Cullybacky, who is preparing a report of his discoveries for the Journal of the Royal Society of Antiquarians of Ireland.)

Muickenagh, L., co. Roscommon.

Mucknoe, L., co. Monaghan.

Muintir Eolais,' co. Leitrim.

*Nahinch, L., co. Tipperary. Ibid., vol. ix.

Naneevin, L., co. Galway.
Ooney, L., co. Monaghan.
Owel, L., co. Westmeath.

Pad or Boat, L., co. Fermanagh.

*Ravel, L., co. Antrim. Ibid., vol. vii.; Journ. R. H. A. Association, 2nd S., vols. iii.

and iv., 3rd S., vol. i., and 4th S., vol. ii.

*Rohan's, L., co. Monaghan.

Ibid.

*Ramor, L., co. Cavan. Ibid., 4th S., vol. vii.
*Rinn, L. (3 or 4 crannogs), co. Leitrim.
Ross, L., co. Armagh. Ibid., vol. vi.
Roughan, L., co. Tyrone. Ibid., vol. vii.
Rouskey, L., co. Monaghan.

Scur, L. (2 crannogs), co. Leitrim.

St. John's, L. (4 crannogs), co. Leitrim.

Talogh, L. (several crannogs), co. Leitrim.

*The Miracles, co. Fermanagh. Journ. R. H. A. Association, 4th S., vols. ii. and v. Toome Bar, co. Antrim. Ibid., N.S. vol. v.

*Tully, L. (3 crannogs), co. Cavan. Ibid., 4th S., vol. vii.

Tullyline, co. Cavan.

Veagh, L., co. Donegal.

Williamstown, L., co Galway. Ibid., 5th S., vol. i. p. 337.
Yoan, L., co. Fermanagh. Ibid., 4th S., vol. ii.

Several reports on prehistoric objects have been promised by scientific observers in various parts of the country, and your Committee urge that no more delay should be made in presenting them than is compatible with accuracy and thoroughness. It is requested that the Committee be reappointed as before without grant.

Fourth and Final Report of the Committee, consisting of the Hon. RALPH ABERCROMBY, Dr. A. BUCHAN, Mr. J. Y. BUCHANAN, Mr. J. WILLIS BUND, Professor CHRYSTAL, Mr. D. CUNNINGHAM, Professor FITZGERALD, Dr. H. R.. MILL (Secretary), Dr. JOHN MURRAY (Chairman), Mr. ISAAC ROBERTS, Dr. H. C. SORBY, and the Rev. C. J. STEWARD, appointed to arrange an investigation of the Seasonal Variations of Temperature in Lakes, Rivers, and Estuaries in various parts of the United Kingdom in co-operation with the local societies represented on the Association. (Drawn up by Dr. H. R. MILL.)

[PLATE XV.]

AT the meeting of 1890 this Committee requested reappointment with a grant of 501. in order to draw up a final report on the work inaugurated at its suggestion and carried on by observers, most of whom acted under the auspices of local scientific societies represented on the Association. It was proposed to include in the final report a quantity of material of great value bearing on the seasonal and diurnal variation of river- and sea-temperature accumulated by the Scottish Meteorological Society and still unpublished, and, in addition, to give a general discussion (supported by recent publications of observations in the 'Reports of the Fishery Board for Scotland' and other journals) of the whole question of the variation of temperature in exposed bodies of water as determined

The

by season, actual meteorological conditions, tidal influence, &c. grant of 201. which was given to the Committee on its reappointment was quite inadequate to pay the working expenses of the scheme and admit of employing a competent person to tabulate and compute means of the great mass of available material.

It was accordingly resolved to confine the scope of this report to an account of the observations made on the direct initiative of the Committee, and to the statement of such brief summaries as might be supplied in tabular form by previous observers. The main object held in view by members of this Committee from its first appointment, viz. to produce an authoritative and exhaustive memoir on the seasonal variations of temperature in the lakes, rivers, and estuaries of the British Islands had to be abandoned. At the close of its four years of existence the Committee can only claim to add some additional data to the store awaiting future discussion. This addition is of considerable scientific value, and casts light on several problems in the régime of lakes and rivers. The observations have, however, led directly to another and perhaps even more beneficial result. Great interest was taken by the Conference of Delegates from local societies in the establishment of observations in their own neighbourhood. The consciousness that they were engaged in collecting data for a special and definite purpose has stimulated many of the observers to a more earnest study of science, and done something to forward that spirit of fellowship amongst all scientific workers which for the last few years the Association has been so successfully advancing by means of the annual conferences. The results of this stimulus may, it is hoped, continue even when the observations which produced it have ceased.

The three previous reports of the Committee may be referred to for particulars as to the method of working, the instruments employed, and the period over which the observations extended; a comparatively small number were continued into the year 1891. The first report was mainly preliminary. The observations it records were upon rivers in Scotland, and although several of the observers have continued their work, most contented themselves with the record of a few months only. The second report 2 notes a large accession of observers on the rivers of England and of Ireland, and as an appendix the directions to observers are reprinted, showing the conditions in which it was desirable that all the observations should be made. In 1889 the reappointment of the Committee was not accompanied by a grant of money, and the observations in that year consequently suffered to a certain extent. The third report 3 gives an epitome of the material collected by the Committee, which forms the basis of the present discussion. The three previous reports, it will be noticed, deal exclusively with the organisation and extent of the observations, none of the data being recorded or discussed in them.

Some of the sets of observations have been published in detail. Of these the most important is that accumulated by Dr. Sorby during the years 1884-1888 on the estuaries of the south-east of England, which appeared in the Scottish Geographical Magazine' for 1889 (vol. v. p. 589). An abstract of the results is included in the present report. Observations on the River Thurso, by Mr. John Gunn and others, were 2 Ibid. 1889, p. 44. Ibid. 1890, p. 92.

1 B.A. Reports, 1888, p. 326.