80 Exhibition of minerals, [Apeil, 



To these Dr. Fischer has added a fragment of " cTiloromelanite'^ which 

 I understand to be of great rarity. I learn from Dr. Fischer that although 

 celts of this material are found in Europe, the locality of the rock is still 

 a mystery. 



The last specimen is a small nephrite knife from the lake dwellings of 

 Manrach, Lake of Constance. 



I should be glad of anj^ information regarding " chloromelanite.^* 



When the specimens have been inspected by the Society, I should 

 wish them made over to Dr. Anderson for the India Museum. 



Me. Rivett-Cahnac subsequently wrote : — 



I have something more about chloromelanite from Dr. Fischer. He 

 says the nephrite hatchets are found on the Swiss lakes in some quantities, 

 but not in Germany, or France. Celts of jadeite, and chloromelanite are 

 found in Germany west of the Elbe, all over France, in Italy, Greece, 

 and Asia Minor. Chloromelanite is found with jade in the form of scarabs 

 in Egypt. But chloromelanite, he adds, has never been found in tl^e 

 mass. 



I am curious to know whether there is any of this mineral in the 

 Museum ? 



Mr. Medltcott, Superintendent, Geological Survey, to whom the 

 specimens were submitted, sent the following note : — 



" Chloromelanite''^ is not quoted in any work on mineralogy we possess, 

 even in Dana's latest Supplement, of 1882. One would presume it had 

 some affinity to the mineral ^^ chloromelan*^ or ' cronstedtite,' but this 

 cannot be, for this mineral has only a hardness of 25 whereas the sub- 

 stance under reference is over 7, harder than ordinary jade. 



The following papers were read— 



1. Note on some further Belies from Sanhissa, Fatehgarh District, 

 N.-W. Provinces, India. — By H. Rivett-Carnac, C. S., C. I.E., 

 F. S. A. 



This will be published in the Journal, Part I, 1883. 



2. Breliminary Beport on comparative observations of air-temperature 



and humidity at different elevations above the ground -surface. — By 



Dr. H. Warth, Professor of Natural Sciences, Forest School, Dehra, 



N-W. Provinces. Communicated by H. F- Blanfoed, F. R. S., 



Meteorological Reporter to the Oovernment of India. 



1. The ground observatory which is called No. 1 in the records is on 



grass land in the compound of the Forest Office. There are few trees 



about. The nearest group of trees, with a height of about 40 feet, is 100 



feet distant from the observatory. The shed is according to the standard 



