ON SEISMOLOGICAL INVESTIGATIONS. 61 
X. A Catalogue of Destructive Earthquakes. 
(Still in preparation; see ‘ B.A. Report,’ 1908, p. 78.) 
During the last twelve months, as opportunity presented itself, 
additions have been made to a catalogue of destructive earthquakes com- 
menced in 1907. Very many entries have been made from ‘ I Terremoti 
d'Italia,’ by Mario Barata. The catalogues of C. W. C. Fuchs pub- 
lished in the ‘ Mineralogische und Petrographische Mitteilungen ’ have 
been an assistance in extending those of Alex. Perrey; while transla- 
tions from Tung-Hwa-Lu, by Professor E. H. Parker (see p. 62), have 
extended the catalogue of Chinese earthquakes contained in the 
‘ British Association Report,’ 1908, p. 82. With these additions the 
compilation is at present represented by about 250 typed folios. 
One result towards which its analysis points relates to the syn- 
chronism of seismic activity (see p. 56). 
With the expectation of finding much material which might be used 
in this catalogue, I wrote to Comte F. de Montessus de Ballore, at the 
present time in Chile, asking whether it would be permissible to use his 
compilation of earthquake registers now stored at the Société de 
Géographie, 184 Boulevard Saint-Germain, Paris. He most willingly 
put this at my disposition. The catalogue is composed of about six 
hundred parts, which are in MSS. and in the language of the country to 
which they refer. They occupy a length of 26 metres of bookshelves, 
and for the convenience of those who wish to make researches a cata- 
logue is provided. I understand from Comte Montessus that a number of 
destructive earthquakes which are recorded are but little known and 
difficult of access. Dr. F. Du Bois, who takes a practical interest in 
seismology, suggests that when using the Montessus catalogue it may 
often be necessary for the particular purpose in view to seek for details 
in the original works on which it is founded. The following are a few 
examples of the entries :— 
1597, July 23, Perth and other parts of Scotland, Thompson’s 
* Annals of Philosophy,’ vol. viii. p. 365; Mallet, 1852, p. 66. 
1845, August 7, 14h. 15m., A. Comrie (Ecosse), 1 secousse violente ; 
MacFarlane ; Perrey Cat. 1845-46, p. 407, 18h. 15m., &c. 
1880, November 28, 17h. 30m., Scotland Proc. Roy. Soc. Edinb. 
XI., pp. 176-187, followed by observations . . . at different places. 
Remarks extend over twelve pages of MS. 
XI. Developing, Fixing, and Copying a Film. 
The developer is made up as follows :— 
Metol-hydroquinone Developer. 
Metol : 30 grains or 7:0 grammes. 
Hydroquinone : ‘ GOW van oe ‘0 =" 
Sodium Sulphite (cryst.) 1Oze o.55100°0 % 
Sodium Carbonate (cryst.) ie » 1000 iy 
Water ~. . A 3 20.35 », 2000 c.c. 
For use, dilute with an equal volume of water. 
__ The bromide paper after removal from the drum is rolled up film 
side inwards. A small quantity of dilute developer is put into a half- 
plate dish, then commence to unroll the film in the dish and at the same 
