SYMONDS — 
NOTES 01' A GEOLOGIST IN IIIELAND. 
293 
and lir had noted the eft'eet of the explosion of eight tons of gun- 
powder in those (pianies. The shock was so great as to he felt at tlic 
distance of two miles, and even threw crockery off the shelves of 
houses situated at that distance. In connection Avith this suhject, INIr. 
Mallet mentioned that at Rio Gambia, during an eartliquake, where 
the shock 'was perpendicular and not lateral, people were f hot upwards 
more than two feet. 
The scenery of Dublin l>ay is bold and lieautiful. It is backed by 
the Sugar Loaf and Lugnaipiilla Hills ; and, seen for the tirst 
time, under a Ijright sunshine, fi'w persons would forget such a view. 
The ( J-eological Section, at the Dublin ineeting, was below its usual 
mark, owing probably to the absence of the most renowned of our 
English geologists — Lyell, the philosopher of his science, was travelling 
in Italy or iSwitzerland ; Murchison was in Germany ; and the veteran 
Sedgwick hors do comhnt with the gout ; nevertheless there were 
some excellent papers by Professors Hennessey, Jukes, Haughton, 
and Harkness, Dr. Kinahan, Mr. Du ^Toyer, and many others ; also 
an admirable paper on Iiiilii, by Professor Oldham. The Museum 
of Irish Industry is a credit to Dublin, and to the gentlemen 
connected Avith that institution. It is a most instructive collection 
of the manirfactures, the raw materials, the geology, and the 
mineralogy of Ireland. The stranger -geologist and naturalist Avants 
to see Irish fossils and minerals ; and here, thanks to the labours 
of the Geological Surveyors, he can do so without being, in any 
way, incommoded by boots, harps, South Sea canoes, Chinese slippers, 
and cobAvebs. AVe Avould acknowledge the ready kindness and 
information Ave received from Professor Jukes, Mr. Du Noyer, and 
Mr. John Kelly, a Avorking geologist on the staff of Dr. Griffiths Avhen 
geology Avas more tedious and difficult than in these days of accumulated 
knowledge, niajis, and sections. J*Ir. Du Noyer Avas good enough to 
point out to VIS one of those ancient marine Avorms, from the Cambrian 
deposits of Ireland, Avhich Avas actually fossilized in its burroAv ! 
This old relic of life from the oldest knoAvn sedimentary rocks, is 
named by its discoverer. Dr. Kinahan, Histiodenna Hibernicum. 
These " trumpet-shaped membranous tubes of a tentaculated worm " 
may be found both at Bray and HoAvtli. There is also a fine scries of 
that early zoophyte (or bryozoon, according to some), the Oldhamia, 
