284 JOURNAL OF SCIENCE. 
shew that it was a chemically weathered surface. It could not 
pass over the paintings, however great their age, because it was 
only a chemically weathered surface and not an incrustation. He 
would, if wished, on another occasion, bring many more books to 
prove that he was right. All that he could now say was that 
every statement made by Professor Hutton proved distinctly that 
there was no incrustation of carbonate of lime on the surface. 
REPORT ON THE ANALYSIS OF A SAMPLE OF LIMESTONE RECEIVED 
FROM PROFESSOR VON. HAAST. 
The specimen examined consisted of a scale or flake of a light 
buff limestone, on the outer surface of which there existed darker 
layers possessing greater density and hardness than the interior 
portion of the stone. The analysis was made at the request of 
Professor Haast, for the purpose of ascertaining whether any 
difference existed in the chemical composition of the two portions, 
more particularly in regard to the presence of stalagmite in the 
outer portion. The layers were carefully separated, and found 
on analysis to be of the tollowing composition :— 
No. 1—Out- No, 2—In- 
side side 
Adherent Moisture ... - oi 1°20 1°30 
Organic Matter and Combined Water 1°67 1°03 
Insoluble Sli, ayy 42: a ey 15°78 
in Alumina... eo 1°36 96 
Hydrochloric Acid ) Iron Protoxide ... “20 “66 
Alumina rt 98 1°87 
Soluble in Iron Carbonate ... payee hi 2"@8 
Hydrochloric Acid ( Calcic Carbonate... 75°50 75°04 
Magnesic Carbonate 1°13 1°54. 
100'20 100°18 
These results show that but little difference exists in the general 
composition of the two parts of this stone, other than that pro- 
duced by the decomposing action of weathering on the silicates 
present causing a rearrangement of the elements, and this is 
probably the cause of the greater hardness and density of the sur- 
face portion. 
(Signed) GEorRGE Gray, 
Analyst. 
Cant. Coll. Lab., Oct. 5, 1882. 
AUCKLAND INSTITUTE. 
August 28th, 1882.—E,. A. Mackechnie, Esq., President, in the 
chair. 
New members—J. McLaren, P. E. Cheal, H. W. Northcroft, 
J. H. Jackson, T. Wells, F. R. Webb, Rev. Mr. Gulliver. 
Papers—(1.) ‘‘ New Genera and species ot Cwurculionde,” by 
Capt. T. Broun, M.E S. Three new genera and 42 new species 
. 
were described. Of these 32 had been collected in Otago, mainly _ 
by Messrs. Fulton and Chalmer, one in Canterbury, two in Wel- 
lington, and the remaining seven in Auckland. Capt. Broun stated 
yhat the number of Curculionidea known to exist in New Zealand 
