TRANSACTIONS OP THE SECTIONS. 
75 
Mr. Sims exhibited specimens of borate oflime, anil stated that the nucleus of some 
of ihe pieces consisted of magnesian limestone ; that they were also sometimes 
coated with crystals of nitrate of soda, chloride of sodium, glauherite and iodide of 
t.xlium. The presence of iodine was demonstrated. 
0* Me Production of Sulphurous Acid Gas from the Combustion of Coal. 
By Joseph Spence. 
1 I author questioned the great benefit likely tu be derived from the abolition of 
smoke nuisance. The imperfect combustion of fuel, as carried on at present, only 
mo on annoying deposit of carbon, and this Mr. Spence regarded us a healthy 
the more complete burning of the fuel, this carbon would be oxidised into 
ewwrrnc acid, a poisonous gas, and the sulphur at present escaping combustion would 
jsurnto sulphurous acid, tic instanced the smoke-consuming movement in Man¬ 
's! m i °* lscrve ^ diat vegetation in the neighbourhood was being destroyed, 
t,.1 1 10 t !e . vcr - v muc ^ ^ ar g or quantity of carbonic and sulphurous acids which were 
*! ™ >nto the atmosphere. 
c/l di ^ on ensued when this paper was finished, and Mr. Lowe remarked 
"nrjm'i?! P artle ® w ho did not admire smoke might obviate the inconvenience by 
'g gas coke, as was done in tire noble hall where they were assembled. 
llith 0,1 U ?leW Electrical Battery. By W. Svmons. 
“naturc'lfm.tf^'^L ^ ®>' mons was composed of a series of plates made of 
* found in .i,„ pu percha » Bees'-wax, and shell-lac. A description of this battery will 
® the Ph «maceutical Journal for July of the present year. 
On the Rebutting of the Koh-i-.Voor Diamond. 
At (he mect . n h, J Professor J. Tenxa n r, F. G.S. 
'' ’'® diamond c m °,i j 8 Association at Belfast, the author gave some account 
fN | , , t,a,1, l on this oeoniiT? 1 the remarkable changes w hich it had under- 
form and cloavn™* some interesting diagrams illustrating the cry- 
drawing attention t mi p 8 d,am ond. Mr. Tennant now introduced tin* subject 
‘ ’ “ow reduced }»• ™o.° nTKl weight of thu diamond, compared with its present 
, l - 1(1 the hiatft-,/_p > an <l oho to its rnineralogical appearances. With 
rllnv..., , l0r J °f this UXlrnowti’ii'i .. l... .i.. 1.-J 
. . previously enjoyed by ...„ » uu ..v, w. 
■ - V u ' umniond WaB t i, “ st ,ILmd3er "f foreign valuable stones, and probably the 
Ul w hich that ilinnf ni i°i t nhrnctive in that valuable collection. The rough 
When ti lr , Ulltl , ^ eetI cu b however, had di sap noin ted many who 
• i-i. . Iaill i hut when thr. 8 !** 11 Sh °" 0 0,1 ' l at noon-day the stone appeared pecu- 
4-uh,' C „ e ," f glass. 'j’liis n,nr'T P . im ' WnH du "> n I' ad n3 ‘ rely the appearance of a 
, r 'J e tho lnind, Lt 11 ln , ft vpr )' unfavourable position, nnd caused 
;• la the ,0 Runjeet Sinol Be,lt i. eme " u lo il * «n I hen tic it j This diamond 
0 p ., ,sl( ' ai of Eastern „ , '* W J»° uxiHiUy wore it upon his left arm, accord- 
‘ l| "kyL Majssly'g ftl,d tT,c ori ginal mounting was now in the 
]"MV, g made of it l, v >C sl , olle l H ' r ^ cc tly Agreed with the drawing 
^ ^'"ct c 0 \ bor nt?. who K’ ,,1 and n ' so 'vith the account given of it by the 
^ ofdCntf, * Ver >; J!“* of the Court 
L| U "^d hv|.f mp ' e white, wearing, " u '!' as i'I ||ld an* 1 a cripple ulso) sat arrayed 
S* of di^Wm cf„ Up0n ^ arm "" Kol»-i-Noor diamond, and sur- 
'"* W'-i.k ur?' 0MA ’"*- *»*■• w» in the 
dJ* ^ p2*5? ted u l">n various C ‘r^ pl i'"' tORe,hcr wi,h '"'mcrous other 
Clift 1 and * ,le nobles w-enmn ^° f t ?- 1,i,r " CM * AU *uthentic accounU 
Au c ti fJU0 > file ! 1 . o ' 0r * e of Runjeet Sir dccora,, "B 'heir homes in this 
and li? t , h ‘ (,ll -i-^o<'r beirm ,? ” 1 “* <,, ', c, ’ rated wid > diamonds valued at 
i» the p.^r, the II OI \ pummel of the 
East Indies, and M- ^ P- ,ad f* dUmood sent to them for in- 
n 3 drawings agreed with the appearance 
