THE FIRST WINTER MEETING. XX111. 



The Hon. Sec., Dr. Colley March, showed a number of slides of nitrate of 

 silver dissolved in mucilage, through which a feeble current of electricity had 

 been passed until the solution dried. These slides, which were prepared fifteen 

 years ago, displayed similar colours, which he then regarded as phenomena of 

 refraction and interference depending upon particles of the liberated metal lying 

 in different planes and set at different angles, and causing an iridescence like that 

 of "Newton's Kings." Mr. Ponton proved that his radiator not only produced 

 colour effects on chloride of silver paper, but discharged nascent silver into the 

 atmosphere, causing a metallic deposit through air similar to an electrolytic 

 deposit through liquids ; but this action did not take place in dried air, so that 

 watery vapour was essential. 



Dr. March, with a radiator that Mr. Ponton had given him, had produced 

 similar colour displays with emulsions of nitrate of mercury, of chloride of lead, 

 and of chloride of manganese ; but has failed, after three weeks' exposure, to 

 effect any change in one of chloride of copper. 



Mr. Ponton believed that these colour effects were likewise due to differently 

 coloured allotropic forms of the respective metals. 



BY ME. HENRY MOULE : 



A hoard of bronze implements lately found at Lulworth and lent to the Dorset 

 County Museum by Miss Weld. 



The farm of Sleight forms part of the Lulworth Castle Estate. It is in the 

 parish of Winfrith, but nearer to the village of West Lulworth, on which you 

 look down from some of its lofty fields. On this high-lying farm there is a great 

 drift of flints on the chalk. Geologically, these beds of flints are very interesting, 

 inasmuch as they are held to be a survival from the great denudation of tertiary 

 and secondary strata in Dorset. In the opinion of the late Mr. Mansel-Pleydell 

 and other able geologists, these beds of flints are relics of a vast mass of chalk 

 strata. Of these the chalk itself was carried away, as all the tertiary strata had 

 been before. The flints of the upper chalk, resisting the disintegrating and 

 carrying power of the denuding water, remained in whole or in great part. Ice 

 action, however, is believed in at least in some Dorset instances by our 

 Secretary and others. This bed of flints on Sleight, whether ice-borne or 

 deposited in water, is being carted away for road metal. During last summer in 

 the course of this work the labourers came upon a wonderful find of bronze relics. 

 These, through the courteous kindness of Miss Weld, we have the advantage of 

 seeing to-day. The bronze relics before you explain themselves, indeed, so that 

 very little need be said. Mr. Sargeaut tells the writer many of these bronzes 

 were found in the flint drift near together, with human bones within a space of 

 30 or 40 yards and a few at a little distance off. Of the 20 items in the list of 

 objects only a few need be specially spoken of. Nos. 1 and 2. This fine bronze 

 sword is a quite priceless acquisition as a loan to the County Museum, where 

 hitherto we have been destitute in this respect. This specimen is 24^iu. long, an 

 average size. Sir J. Evans describes a bronze sword as much as 29iu. long and 



