62 REPORTS ON THE STATE OF SCIENCE. 
time roll up the portion that has passed through the developer. Repeat 
this rolling and unrolling until development is complete. It is then trans- 
ferred to a solution of hyposulphite of soda (1 hypo to 4 water) for 
about ten to fifteen minutes. The record is then washed, &c. 
Any particular portion of a film may be reproduced by photographic 
printing. For the latter process place the film with its back on a piece of 
glass or the glass face of a printing frame. A piece of bromide paper is 
placed with its sensitive surface in contact with the film, and over this a 
strip of wood or the back of the printing frame, when the whole four are 
clamped together with spring clips. 
This is held up to the light of an oil lamp or an ordinary gas-burner 
at a distance of 18 inches for about 10 seconds. Next it is developed in 
a little fresh but dilute developer. If the developer appears too strong, 
add water and a few drops of a 10-per-cent. solution of bromide of potas- 
sium. ‘Too long exposure causes the parts which should be white to 
become grey. A weak acid bath (citric acid 1 part in 40 of water) tends 
to remove stains. In warm climates a saturated alum bath may be used. 
If blisters appear, weaken the hypo-bath. 
XII. Catalogue of Chinese Earthquakes, a.p. 1638-1891. 
By Professor EH. H. Parker. 
The facts contained in the following Register are extracted, and in 
most cases are word for word translations, from the * Tung-Hwa- 
Lu,’ a well-known work which gives textually an account of most of 
the important disasters, prodigies, decrees, and memorials, &c., as news 
arrives day by day at the Peking Court of the reigning Manchu Dynasty. 
The list may be regarded as a continuation of the catalogue published 
in the Reports of the British Association for 1908. Neither of these lists 
is to be looked upon as complete, but if it were possible to refer to the 
local records of the various provincial cities each list might be consider- 
ably extended. The rendering of Chinese names follows pretty closely the 
system of Sir Thomas Wade, but without such extreme localisms (e.g. , hsi, 
hii, chi, chii, instead of si, hi, tsi, tsii, kt, kii) as would render these 
groups of initials, whether used alone or followed by a nasal final, un- 
intelligible to persons only conversant with more southerly dialects. 
Mr. Parker supplies only Chinese dates, but these have been replaced 
by English dates, and, it is hoped, correctly. 
Catalogue. 
1639 Jan. 4. ‘Harthquake’ (evidently in the Mukden region). 
1643 Mar. 24. ‘Earthquake from N.W. corner to §.E. with sound’ (evidently 
S. Manchuria_N. Corea region). 
1643 Nov.12. ‘Earthquake between 9 and 11 A.M. from N.W. to S. with sound’ 
(evidently in S. Manchuria region). 
1644 April14. ‘Earthquake at Mukden.’ 
1644 April16. ‘Again quaked’ (i.e., two days later; evidently Mukden). 
1649 Nov.10. ‘Earthquake at the Metropolis’ (evidently Peking, probably end 
of December). 
1652-3 Ditto (probably end of January or beginning of February, 
1653, the ninth year of the reign covering the greater part of 
1652). 
1653-4 ‘Relief,! ‘When his Majesty returned to the Palace: this night there was 
an earthquake with sound’ (probably January 1654. I cannot 
think why ‘ relief’ or ‘alms’ should precede statement). . 
