26 
between 1869 and 1880 with the published barograms in the Quarterly 
Weather Report, and have also examined the Kew barogram for Apri 
occurr 
22nd, -1884, when th own serious shock occurred in Essex 
The results are shown in Plate II., and they afford no confirmation of 
Hr. Nowack’s statement. No barometrical disturb companie 
1875, when a slight anticyclone (readings 30:1 at centre) prevailed 
over the north-east of En ngland. The shock, which was desc ribed as “a 
slight local ecu was felt in north-west England. 
In this connexi enclose an extract from a letter I received man 
years ago from the . "is Mr. Robert Mallet, F.R.S., whose authority on 
seismological matters will be universally recogni ised. 
Schlagwetter. It does not appear clear whether Hr. Nowack 
describes by this term an explosion, or merely the appearance of fire- 
dam 
HEN. The reports of H.M. Colliery Penes for 1889 wi jl 
appear ) A 
not necessarily those of minor explosions, age certainly no data as to 
that this action will not explain all the occurrences of foul air, or of 
osions. I would refer you to these papers, or to the reports of the 
ProbisictHi Schlagwetter Commission published in Berlin in 1887. 
In conclusion, I have T nam Aus Dr. Oliver a list of dates on which 
I. *Sehlagwetter" or “su Mar as and ILI. * Earthquake 
warnings "'or “sudden anti chis have been predicted. The com- 
parison | of these oid the Tollowing results, The order followed is 
that given in his letter 
L—Schlagwetter. 
Actual position 
lo : of nea 
Date. District predicted. Cyclonic Centre Result. 
on Map. 
1. . October 31 * - | Off Hebrides -| Off Hebrides- | Correct. 
9. ^ 29 - - | Near Cork - | Off Hebrides - Nearly cor 
rect. 
3. »  27to November 1 ne Neweastle- | Over British | Wrong. 
Channel. 
4. » M - - Near: Hanover - | Near Berlin  - | Correct. 
5. »  27toNovemberl | Over  Luxem- | Over British | Nearly cor- 
urg. Channel. reet. 
6. November 12-18 (pro-| Near Paris -| In Frasi: Wrong. 
bably 14th). : 
7 -| Over Central T Hebrides -| Wrong. 
Franee, 
8. d 12-18 (pro- | Off Cornwall - | In Northern Nor-| Wrong. 
14th, 17th, rion). way. 
9. sat Fun 12-1 o- | Over Lancashire | In Northern Nor- Wrong. 
vend 14th, 17th. or id. way. 
