99
OBSERVATIONS.
OBSERVATIONS. Sursum corda !
MASTODON AT WORLINGHAM.—One
o f our
Southwold
men,
working at the Holton äerodrome, on 10 July brought me a tooth of Mastodon [1 Arvernensis, Croiz (cp. Trans, ii, 27)] that he had rescued from a mixing machine. It was found in clay which had been brought from Worlingham near Beccles. It weighs exactly 2 lbs. and is not in a very good State, the cusps along one side all being broken off and the others slightly damaged. I have asked him to look out for any other Fossils, which he has promised to do.—IDA S. CRITTEN, Southwold ; 12 July. [Doubtless washed into the Pliocene Beds west of Worlingham church, probably the fine-grained and highly micaceous Chillesford Clay that outcrops a mile or so N. at Aldby, from older Eocene deposits : quite a new locality.—Ed.] SYLEHAM LAMPS.—Considerable discussion ensued upon our notice of Will-o'-the-Wisp (supra, p. 25). Satisfactory conclusion is not reached, but the three following references seem to set us in the right direction for its discovery. (1) Methane is an odourless gas produced by decomposition of organic matter, and explosive when mixed with severi-eights volumes of air, then constituting coal-mines' fire-damp (Stedman's 1937 Practical Medical Dict.). (2) Methane or marsh-gas is CH 4 and the simplest hydrocarbon. It is met with in marshes where decomposition or decay of vegetable matter is taking place under water ; it also occurs in coal mines, where the gas or fire-damp, issuing from fissures in the coal, sometimes contains eighty-nine per cent. of Methane, to the presence of which, mixed with air, explosions in mines are due. Ordinarily coal-gas contains about ninety per cent. of Methane, which is formed in small quantities by the direct union of carbon and hydrogen at about 1200° (Perkins & Kipping's 1906 Organic Chemistry). (3) Ignis fatuus or fool's fire is a pale flame, sometimes seen over marshy ground, probably caused by the spontaneous combustion of Methane CH4, or other inflammable marsh gas (Uvarov's 1942 little book on Science). Methane is quite different from sulphuretted hydrogen, Dr. Hocken teils us, v.v.—At EAMisc. 10942 (pub. 9 iii 1943) Mr. G. F. Fell of Orford gives valuable first-hand data of this apparition sixty years ago over Kiln Field and Workhouse Field (which word should indicate arable) in Sudbourn, showing its